Table 6-2: 840 Ventilator diagnostic codes

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AE0110Unable to

establish O2

flow EST Flow

sensors cross

check Test

Alert Flow controller unable

to establish and control

oxygen flow at

120 L/min.

1.Make sure oxygen supply is

connected and unrestricted.

2.Verify oxygen regulator pres-

sure is set between 9-12 psi.

3.Switch PSOLs to see if failure

transfers to the other gas side.

If yes, return the air PSOL to its

original position and replace

the oxygen PSOL.

4.Run the leak test in EST to

check for leaks/occlusions.

5.Perform a flow sensor calibra-

tion.

6.Replace Q1.

7.Replace the Inspiratory Elec-

tronics PCB.

8.Replace the AI PCB.

AE0111Unable to

establish air flow EST Flow

sensors cross

check Test

Alert Flow controller unable

to establish and control

air flow at 120 L/min.

1.Make sure air supply is con-

nected and unrestricted.

2.Verify air regulator pressure is

set between 9-12 psi.

3.Switch PSOL's to see if failure

transfers to the other gas side.

If yes, return Oxygen PSOL to

its original position and replace

the Air PSOL.

4.Run the leak test in EST to

check for leaks/occlusions.

5.Perform a flow sensor calibra-

tion.

6.Replace Q2.

7.Replace the Inspiratory Elec-

tronics PCB.

8.Replace the AI PCB.

AE0213Air PSOL leak EST Gas

Supply/SV Test Alert Air PSOL (PSOL2)

forward leak was

detected via excessive

pressure buildup

(>50 cmH2O but

<100cmH2O) in

blocked inspiratory

module.

1.Check for leaks around the Q2

O-rings.

2.Make sure air supply is con-

nected and unrestricted.

3.Reseat Air PSOL.

4.Replace Air PSOL.

5.Replace AI PCB.

AE0214O2 PSOL leak EST Gas

Supply/SV Test Alert Oxygen PSOL (PSOL1)

forward leak was

detected via excessive

pressure buildup

(>50 cmH2O but

<100cmH2O) in

blocked inspiratory

module.

1.Check for leaks around the Q1

O-rings.

2.Make sure oxygen supply is

connected and unrestricted.

3.Reseat oxygen PSOL.

4.Replace oxygen PSOL.

5.Replace AI PCB.

AE0306Test circuit not

connected EST Leak Test Alert Pressure not detected

on expiratory side

1.Make sure test circuit is prop-

erly connected.

2.Replace expiratory bacteria

filter.

3.Check for leaks around the Q3

flow sensor.

4.Check/replace the exhalation

valve.

5.Replace the expiratory pressure

transducer PCB.

AE0601GUI High Alarm

LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0602GUI Medium

Alarm LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0603GUI Low Alarm

LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0604GUI Normal LED

fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0605GUI Batt Backup

LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB

2.Replace the GUI LED PCB.

AE0606GUI On Batt Pwr

LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0607G UI Compressor

Ready LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0608G UI Compressor

Operating LED

fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0609GUI 100% O2

LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace keyboard.

AE0610GUI Alarm

Silence LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AE0611GUI Screen Lock

LED fails.EST GUI Lamp

Test

Alert CLEAR key pressed to

indicate LED not on.

1.Check/replace interconnect

cable between the GUI LED

PCB and the GUI CPU PCB.

2.Replace the GUI LED PCB.

AE0702Bad Vent inop

LED EST BD Lamp

Test

Alert CLEAR key pressed to

indicate one or both

ventilator inoperative

LEDs not on.

Replace BD LED PCB.

AE0703Bad SVO LED EST BD Lamp

Test Alert CLEAR key pressed to

indicate one or both

SVO LEDs not on.

Replace BDU LED PCB.

AE0704Bad Loss of GUI

LED EST BD Lamp

Test

Alert CLEAR key pressed to

indicate loss of GUI LED

not on.

Replace BDU LED PCB.

AE1001Air PSOL

loopback

current OOR EST PSOL

Loopback Test

Alert Air PSOL (PSOL2)

loopback current out of

range of drive current.

1.Verify that the air supply is

good.

2.Verify air regulator pressure set

to between 9 and 12 psi.

3.Switch PSOLs to see if failure

transfers to the other gas side.

If yes, return oxygen PSOL

(PSOL1) to its original position

and replace PSOL2.

4.Switch Q1 and Q2, run a flow

sensor calibration and rerun

test. If the problem transfers to

the other gas side, return Q1 to

its original position and replace

Q2.

5.Replace the AI PCB.

6.Replace the Inspiratory

Electronics PCB.

AE1002O2 PSOL

loopback

current OOR

EST PSOL

Loopback Test

Alert Oxygen PSOL (PSOL1)

loopback current out of

range of drive current.

1.Verify that the oxygen supply is

good.

2.Verify oxygen regulator pres-

sure set to between 9 and 12

psi.

3.Switch PSOLs to see if failure

transfers to the other gas side.

If yes, return the air PSOL to its

original position and replace

PSOL1.

4.Switch Q1 and Q2, run a flow

sensor calibration and rerun

test. If the problem transfers to

the other gas side, return Q2 to

its original position and replace

Q1.

5.Replace the AI PCB.

6.Replace the Inspiratory

Electronics PCB.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AE1104Insp check valve

test failed EST Safety

System Test

Alert It took too little time to

relieve excess pressure

through open safety

valve, indicating

inspiratory check valve

(CV3) may be damaged

or incorrectly mounted.

1.Make sure test circuit is con-

nected.

2.Make sure CV3 is not installed

backward.

3.Replace CV3.

AE1201Exp valve

loopback

current OOR EST Exp Valve

Loopback Test

Alert Exhalation valve

loopback current is out

of range of drive

current.

1.Verify that the system has no

leaks or occlusions by running

the leak test in EST.

2.Clean exhalation valve

diaphragm.

3.Calibrate the exhalation valve.

4.Clean/replace the exhalation

valve.

5.Replace the AI PCB.

AE1305Seal test failed EST Exp Valve

Seal Test Alert Seal test Δ pressure is

above alert level but

below failure level.

1.Verify that the system has no

leaks or occlusions by running

the leak test in EST.

2.Clean the exhalation valve.

3.Calibrate exhalation valve.

4.Replace the exhalation valve.

5.Replace the AI PCB.

AE1600Compressor

Test - Not

installed EST

Compressor

Test

Status Ventilator did not sense

a compressor attached

and skipped test.

No action required.

AE1601Wall air pressure

detected EST

Compressor

Test

Alert Wall air pressure switch

(PS2) detected air after

user was prompted to

disconnect air.

1.Make sure air supply is discon-

nected.

2.Disconnect PS2 and rerun test.

If test passes, replace PS2.

AE1602ac power not

connected EST

Compressor

Test

Alert System is still running

on battery power after

prompting user to

connect ac power.

Compressor can only

run on ac (facility)

power.

1.Plug in ventilator power cord

and check the cord connec-

tion at the ventilator.

2.Check ac.

3.Disconnect BPS to isolate prob-

lem.

4.Replace power supply.

AE1603Compressor

pressure not

detected

EST

Compressor

Test

Alert Compressor pressure

transducer (PC)

indicates that

compressor air is not

present, although

compressor motor is

on.

1.Run compressor leak test to

check for leaks.

http://www.wendangku.net/doc/a2627e20aaea998fcc220ec5.htmle leak detector to check

for leaks at the accumulator

fittings and other tubing

connections.

b.Verify no leaks at CV2 within

the ventilator by plugging

the air inlet fitting.

2.Replace compressor PCB.

3.Contact Puritan-Bennett Tech-

nical Support.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AE1604Run mode time

OOR EST

Compressor

Test

Alert Compressor timer is not

running while

compressor motor is

on.

Listen for motor. If motor is on,

replace compressor PCB.

Otherwise, replace compressor.

AE1606Compressor

pressure

detected EST

Compressor

Test

Alert Compressor pressure

transducer (PC)

indicates that

compressor air is

present after

compressor motor is

disabled and

accumulator drained.

Replace compressor PCB.

AE1607Disabled mode

time OOR EST

Compressor

Test

Alert Compressor timer is

running while

compressor motor is

off.

Replace compressor PCB.

AE1608Unable to test

standby mode EST

Compressor

Test

Alert Compressor standby

mode check cannot be

run, because of inability

to verify timer

functionality during

compressor run and

disabled tests.

1.Troubleshoot code AE1604 or

AE1607, if present.

2.Replace compressor PCB.

AE1609Standby mode

time OOR EST

Compressor

Test

Alert Compressor motor is

still running. During

standby mode test

phase, compressor

motor should

eventually turn off.

Replace compressor PCB.

AE1610Unable to

perform

compressor load

test EST

Compressor

Test

Alert Compressor load test

cannot be run, because

of inability to verify PC

during compressor run

and disabled tests.

Troubleshoot code AE1603 or

AE1606.

AE1611Compressor

load test failed EST

Compressor

Test

Alert Compressor unable to

maintain minimum

pressure under worst-

case breath delivery

waveform.

1.Run compressor leak test to

check for compressor leak.

http://www.wendangku.net/doc/a2627e20aaea998fcc220ec5.htmle leak detector to check

for leaks at the accumulator

fittings and other tubing

connections.

b.Verify no leaks at CV2 within

the ventilator by plugging

the air inlet fitting.

2.Replace compressor.

3.Replace compressor PCB.

AE1700Compressor

Leak Test - Not

installed

EST

Compressor

Leak Test

Status Ventilator did not sense

a compressor attached

and skipped test.

No action required. Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AE1701Unable to

perform

compressor leak

test EST

Compressor

Leak Test

Alert Compressor leak test

cannot be run, because

of inability to verify

timer functionality.

1.Troubleshoot accompanying

code AE1604 or AE1607.

2.Replace compressor PCB.

AE1702Wall air pressure

detected EST

Compressor

Leak Test

Alert Wall air pressure switch

(PS2) detected air

presence after user was

prompted to

disconnect air.

1.Make sure air supply is discon-

nected.

2.Disconnect PS2 and rerun test.

If test passes, replace PS2.

AE1703Wall air pressure

not detected EST

Compressor

Leak Test

Alert Wall air pressure switch

(PS2) did not detect air

presence after user was

prompted to connect

air.

1.Make sure air supply is con-

nected.

2.Run Gas Supply/SV Test.

AE1704Compressor

leak detected EST

Compressor

Leak Test

Alert Compressor leak was

detected using

compressor timer to

detect compressor

turning on momentarily

during test.

Troubleshoot compressor

compartment or inspiratory

module for leaks.

AE1901GUI touch: Error EST GUI Touch

Test Alert Touch screen error

occurred (e.g., blocked

beam or low-level

error), buffer cannot be

read, or report is

invalid.

1.Clean touch screen, removing

any obstructions.

2.Replace touch frame PCB.

3.Replace GUI CPU PCB.

AE2001Bad GUI serial

port EST GUI Serial

Port Test

Alert While in loopback

mode, failed to verify

received message was

identical to transmitted

message.

Replace GUI CPU PCB.

AE2101Battery not

charged EST Battery

Test

Alert BPS not fully charged at

start of test.

1.Allow BPS to fully charge, then

repeat test.

2.Replace BPS PCB.

3.Replace battery pack.

4.Replace BD CPU PCB.

AE2102Battery not

discharging

EST Battery

Test

Alert BPS not discharging

after ac power was

disconnected.

1.Verify ac power is disconnected

when prompted.

2.Replace BPS PCB.

3.Replace battery pack.

4.Replace BD CPU PCB.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AE2103Bad Backup

Power Supply EST Battery

Test

Alert While BPS was

discharging, BPS

voltage dropped below

accepted level or

dropped too quickly.

1.Ensure that the battery pack is

fully charged by checking that

the green LED on the BPS is lit

prior to initiating an EST. If the

amber LED is lit, allow the unit

to charge the batteries prior to

rerunning EST.

2.Replace the battery pack.

3.Replace the BPS PCB.

4.Replace the AI PCB.

5.Replace the power supply.

AE2104Battery not

charging EST Battery

Test

Alert BPS not charging after

ac power was

reconnected.

1.Verify that ac power is recon-

nected when prompted and

that ac is good.

2.Replace BPS PCB.

3.Replace the battery pack.

4.Replace the power supply.

5.Replace the BD CPU.

6.Replace the AI PCB.

AE2300GUI Nurse Call

Test - Not

installed

EST Test Status User pressed CLEAR to

indicate nurse’s call

device not installed.

Test was skipped.

No action required. Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AS0010Unable to

establish O2

flow

SST flow sensor

test

Alert Flow controller unable

to establish and control

oxygen flow at

120 L/min.

1.Make sure oxygen supply is

connected and unrestricted.

2.Verify that the oxygen supply

meets minimum pressure

requirements.

3.Verify that the patient circuit

system has no leaks or occlu-

sions. If not sure, run the first

four tests in EST to get to the

leak test. If the leak test passes

in EST, exit out of EST. Correct

the leak or occlusion in the

patient circuit used in SST and

rerun or try another patient cir-

cuit.

4.Check the oxygen inlet filter

assembly.

5.Verify that the oxygen regula-

tor pressure is set between 9-

12 psi.

6.Run a flow sensor calibration.

7.Switch Q1 and Q2. Rerun the

flow sensor calibration and

EST. If the failure transfers to

the air side, return Q2 back to

its original position and replace

Q1.

8.Switch PSOLs to see if the fail-

ure transfers to the air side. If

yes, return PSOL2 back to its

original position and replace

PSOL1.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AS0011Unable to

establish air flow SST flow sensor

test

Alert 1.Flow controller

unable to establish

and control air flow

at 120 L/min.

1.Make sure air supply is con-

nected and unrestricted.

2.Verify that the air supply meets

minimum pressure require-

ments.

3.Verify that the patient circuit

system has no leaks or occlu-

sions. If not sure, run the first

four tests in EST to get to the

leak test. If the leak test passes

in EST, exit out of EST. Correct

the leak or occlusion in the

patient circuit used in SST and

rerun or try another patient cir-

cuit.

4.Check the air inlet filter (F2).

5.Verify that the air regulator

pressure is set between 9-12

psi.

6.Run a flow sensor calibration.

7.Switch Q1 and Q2. Rerun the

flow sensor calibration and

EST. If the failure transfers to

the oxygen side, return Q1

back to its original position and

replace Q2.

8.Switch PSOLs to see if the fail-

ure transfers to the oxygen

side. If yes, return PSOL1 back

to its original position and

replace PSOL2.

AS0012O2 pressure not

detected SST flow sensor

test

Alert Oxygen pressure not

detected via PS1. Only

air available for SST.

Make sure oxygen supply is

connected.

AS0013Wall air pressure

not detected SST flow sensor

test

Alert Air pressure not

detected via PS2 or PC.

Only oxygen available

for SST.

Make sure air supply is connected.

AS0202Excessive leak SST Circuit leak Alert Pressure drops to 85

cmH2O in 10 s,

then in 10 s more by

≥ 10 cmH2O.1.Make sure patient circuit is

connected and is not leaking.

2.Check exhalation valve opera-

tion.

3.Verify connections of bacteria

filters and humidifier are

secure.

AS0305Occluded

expiratory filter SST Expiratory

filter

Alert Pressure drop across

filter > 2cmH2O, but

<3 cmH2O.

Consider replacing expiratory

filter.

AS0308Occluded

expiratory

compartment

SST Expiratory

filter

Alert Exhalation

compartment pressure

>3 cmH2O but

< 4cmH2O.

1.Check compartment for

obstruction.

2.Verify exhalation valve opera-

tion by running EST.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AS0311Low expiratory

filter ΔP SST Expiratory

filter

Alert Pressure drop

across expiratory filter

< 0.4 cmH2O, but

> 0.1 cmH2O.

1.Repeat test, following direc-

tions more closely.

2.Replace filter.

AS0403Occluded

inspiratory limb SST Circuit

Resistance

Alert Inspiratory limb

pressure > 8.5 cmH2O

(adult) or 5.5cmH2O

(pediatric), but

< 12.5 cmH2O (adult)

or 7.5cmH2O

(pediatric), indicating

occlusion.

Check for occluded patient tubing.

AS0406Occluded

exhalation limb SST Circuit

Resistance

Alert Expiratory limb

pressure > 8.5cmH2O

(adult) or 5.5cmH2O

(pediatric) but > 12.5

cmH2O (adult) or

7.5cmH2O (pediatric),

indicating occlusion.

Check for occluded patient tubing.

AS0407Unable to reach

min peak flow SST Circuit

Resistance

Alert During characterization

of total circuit

resistance over a range

of flows, peak flow

< 80L/min but > 60 L/

min.

Check for kinked or occluded

patient tubing.

AS0411Unable to reach

min peak flow SST Circuit

Resistance

Alert During characterization

of total circuit

resistance over a range

of flows, peak flow was

less than alert

threshold.

Check for kinked or occluded

patient tubing.

AS0413Insp limb

resistance low SST Circuit

Resistance

Alert Inspiratory limb

pressure < 0.6 cmH2O

(adult) or 5.5cmH2O

(pediatric), but

> 0.2 cmH2O.

1.Make sure inspiratory filter is

installed.

2.Repeat test, following direc-

tions more closely.

3.Replace inspiratory filter.

4.Replace patient circuit.

AS0414Exp limb

resistance low SST Circuit

Resistance

Alert Expiratory limb

pressure < 0.6cmH2O

(adult) or 0.5 cmH2O

(pediatric), but

> 0.2cmH2O.

Replace patient circuit.

AS0505Excessive

compliance

SST

Compliance

calibration

Alert High compliance

>6 mL/cmH2O (adult)

or 4.5mL/cmH2O

(pediatric), but

< 12mL/cmH2O (adult)

or 9 mL/cmH2O

(pediatric).

1.Make sure correct patient tub-

ing type was specified in SST.

2.Replace patient circuit. Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

AS0507Compliance low SST

Compliance

calibration Alert High compliance falls

below 1.56 mL/cmH2O

(adult) or 1.34 mL/

cmH2O (pediatric) but

not lower than

1.05 mL/cmH2O.

1.Make sure correct patient tub-

ing type was specified in SST.

2.Replace patient circuit with a

known good circuit and filter

set.

3.Run EST to check the operation

of PI and PE during the Circuit

Pressure Test. Replace applica-

ble pressure transducer.

4.Run Atmospheric Pressure

Transducer calibration.

AS0509Excessive

compliance SST

Compliance

calibration

Alert Low compliance >

6 mL/cmH2O (adult) or

4.5mL/cmH2O

(pediatric), but <

12mL/cmH2O (adult)

or 9 mL/cmH2O

(pediatric).

1.Make sure correct patient tub-

ing type was specified in SST.

2.Replace patient circuit with a

known good circuit and filter

set.

3.Run EST to check the operation

of PI and PE during the Circuit

Pressure Test. Replace applica-

ble pressure transducer.

4.Run Atmospheric Pressure

Transducer calibration.

AS0511Compliance low SST

Compliance

calibration Alert Low compliance falls

below 1.56 mL/cmH2O

(adult) or 1.34 mL/

cmH2O (pediatric), but

not below

1.05 mL/cmH2O.

1.Make sure correct patient tub-

ing type was specified in SST.

2.Replace patient circuit with a

known good circuit and filter

set.

3.Run EST to check the operation

of PI and PE during the Circuit

Pressure Test. Replace applica-

ble pressure transducer.

4.Run Atmospheric Pressure

Transducer calibration.

Dxxxxx Assertion Background

Checks (BD)Failure that

results in a

POST or a

reset

System generated a

reset to correct a

boundary check or

possible data

corruption of control

variables.

Replace the BDCPU PCB.

DT0002Bus error /

Access fault Background

Checks (BD)

Failure that

results in a

POST or a

reset

Hardware trap from an

access fault due to a

bad memory chip, bad

control line, or a

hardware timing issue.

Replace the BD CPU PCB.

Exxxxx Varies Background

Checks (GUI)Status A status message

indicating an event that

was intentionally

caused.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

NOTE:

For all "FE" codes (failures reported during EST), diagnose the problem and perform the repair.

Run a complete EST to reset the EST test failure in memory. If there is a failed EST test result in

memory, normal operation is prevented until the failed EST test is rerun and passes.

FE0001Inspiratory

autozero out of

range EST Circuit

Pressure Test

Failure Inspiratory pressure

transducer ADC count

at 0cmH2O is out of

range.

1.Replace SOL1.

2.Replace Inspiratory Electronics

PCB.

3.Replace AI PCB.

FE0002Expiratory

autozero out of

range EST Circuit

Pressure Test

Failure Exhalation pressure

sensor ADC count at

0cmH2O is out of

range.

1.Replace SOL

2.

2.Replace exhalation transducer

PCB.

3.Replace AI PCB.

FE0003Failed to reach

test pressure EST Circuit

Pressure Test

Failure Unable to build

pressure (air) to

10cmH2O at

5 L/min within time-out

period.

1.Make sure that test circuit is

installed and air supply or com-

pressor is available and good.

2.Verify that the air regulator

pressure is set between 9-12

psi.

3.Verify that the patient circuit

system has no leaks or occlu-

sions by running the first four

tests in EST to get to the leak

test.

FE0004Cross-check

failed EST Circuit

Pressure Test

Failure Inspiratory/expiratory

pressure transducer

readings at 10cmH2O

test pressure are too far

apart.

1.Verify that the system has no

leaks or occlusions. If not sure,

run the first four tests in EST to

run the leak test

2.If the leak test passes in EST,

exit out of EST. Review the

data for the Circuit Pressure

Test to determine which pres-

sure transducer is out of range:

PI or PE. Replace applicable

pressure transducer.

3.Replace AI PCB.

FE0005Bad insp

autozero

solenoid EST Circuit

Pressure Test

Failure Inspiratory pressure

reading (taken after

inspiratory pressure

transducer autozero

solenoid (SOL1)

actuated) out of range

(-0.60 to 0.60 cmH2O).

1.Replace SOL1.

2.Replace Inspiratory Electronics

PCB.

3.Replace AI PCB.

FE0006Bad exp

autozero sol

EST Circuit

Pressure Test

Failure Expiratory pressure

reading (taken after

expiratory pressure

transducer autozero

solenoid (SOL2)

actuated) out of range

(-0.60 to 0.60 cmH2O).

1.Replace SOL

2.

2.Replace exhalation transducer

PCB.

3.Replace AI PCB.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0007Cross-check

failed EST Circuit

Pressure Test

Failure Inspiratory/expiratory

pressure transducer

measurements at 50 or

100cmH2O test

pressure are too far

apart.

1.Replace the expiratory bacteria

filter.

2.Verify that the system has no

leaks or occlusions. If not sure,

run the first four tests in EST to

run the leak test.

3.If the leak test passes in EST,

exit out of EST. Review the data

for the Circuit Pressure Test to

determine which pressure

transducer is out of range: PI or

PE. Replace applicable pres-

sure transducer.

4.Replace AI PCB.

FE0008Failed to reach

test pressure EST Circuit

Pressure Test

Failure Unable to build

pressure (air) to 50 or

100 cmH2O at 5 L/min

within time-out period.

1.Make sure air supply or com-

pressor is available.

2.Check for system leak at the

expiratory bacteria filter or O2

sensor. If not sure, run the first

four tests in EST to run the leak

test.

FE0010ac power not

connected EST Circuit

Pressure Test

Failure System is still running

on battery power after

prompting user to

connect ac power. EST

can only run on ac

(facility) power.

1.Plug in ventilator power cord.

2.Disconnect BPS to isolate prob-

lem.

3.Replace power supply.

FE0101O2 flow sensor

cross check

failed

EST Flow

sensors cross

check Test

Failure Oxygen flow sensor

(Q1) cross-check failed.

1.Make sure oxygen supply is

connected and unrestricted.

2.Verify that the oxygen supply is

good.

3.Verify that the system has no

leaks or occlusions. If not sure,

run the first four tests in EST to

run the leak test.

4.Run a flow sensor calibration.6.

Switch Q1 and Q2. Rerun the

flow sensor calibration and

EST. If the failure transfers to

the air side, return Q2 back to

its original position and replace

Q1.

5.Switch PSOLs to see if the fail-

ure transfers to the air side. If

yes, return PSOL2 back to its

original position and replace

PSOL1.

6.Replace exhalation flow sensor

(Q3)

7.Replace AI PCB.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0102O2 PSOL current

out of range EST Flow

sensors cross

check Test

Failure Oxygen PSOL (PSOL1)

current is out of range

with respect to flow

sensor (Q1).

1.Make sure oxygen supply is

connected and unrestricted.

2.Verify that the oxygen supply is

good.

3.Verify that the system has no

leaks or occlusions. If not sure,

run the first four tests in EST to

run the leak test.

4.Switch PSOLs to see if the fail-

ure transfers to the air side. If

yes, return PSOL2 back to its

original position and replace

PSOL1.

5.Run a flow sensor calibration.

6.Switch Q1 and Q2. Rerun the

flow sensor calibration and

EST. If the failure transfers to

the air side, return Q2 back to

its original position and replace

Q1.

FE0103Air flow sensor

cross check

failed

EST Flow

sensors cross

check Test

Failure Inspiratory module air

flow sensor (Q2) cross-

check failed.

1.Make sure air supply is con-

nected and unrestricted.

2.Verify that the air supply is

good.

3.Verify that the system has no

leaks or occlusions. If not sure,

run the first four tests in EST to

run the leak test.

4.Run a flow sensor calibration.

5.Switch Q1 and Q2. Rerun the

flow sensor calibration and

EST. If the failure transfers to

the oxygen side, return Q1

back to its original position and

replace Q2.

6.Switch PSOLs to see if the fail-

ure transfers to the air side. If

yes, return PSOL back to its

original position and replace

PSOL2

7.Replace exhalation flow sensor

(Q3).

8.Replace AI PCB.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0104Air PSOL current

out of range EST Flow

sensors cross

check Test

Failure Air PSOL (PSOL2)

current is out of range

with respect to air flow

sensor (Q2).

1.Make sure air supply is con-

nected and unrestricted.

2.Verify that the air supply is

good.

3.Verify that the system has no

leaks or occlusions. If not sure,

run the first four tests in EST to

run the leak test.

4.Switch PSOLs to see if the fail-

ure transfers to the air side. If

yes, return PSOL back to its

original position and replace

PSOL2

5.Run a flow sensor calibration.

6.Switch Q1 and Q2. Rerun the

flow sensor calibration and

EST. If the failure transfers to

the oxygen side, return Q1

back to its original position and

replace Q2.

FE0106Unable to

establish O2

flow EST Flow

sensors cross

check Test

Failure Flow controller unable

to establish and control

oxygen flow at 60, 5,

and 1 L/min.

1.Make sure oxygen supply is

connected.

2.Check regulated oxygen pres-

sure.

3.Replace PSOL1 or Q1.

4.Replace AI PCB.

FE0107Unable to

establish air flow EST Flow

sensors cross

check Test

Failure Flow controller unable

to establish and control

air flow at 60, 5, and 1

L/min.

1.Make sure air supply is con-

nected.

2.Check regulated air pressure.

3.Perform flow sensor calibra-

tion.

4.Replace PSOL2 or Q2.

5.Replace AI PCB.

FE0108O2 zero flow

check failed EST Flow

sensors cross

check Test

Failure Inspiratory flow >

0.153 L/min with

oxygen PSOL (PSOL1)

commanded to 0

(closed).

1.Verify no leaks at the Q1

O-rings.

2.Run EST Gas Supply Test to

check for PSOL1 leak. Remove

and then reseat PSOL1

3.Replace PSOL1.

4.Perform a flow sensor calibra-

tion.

5.Replace Q1.

FE0109Air zero flow

check failed

EST Flow

sensors cross

check Test

Failure Inspiratory flow >0.153

L/min with air PSOL

(PSOL2) commanded

to 0 (closed).

1.Verify no leaks at the Q2

O-rings.

2.Run EST Gas Supply Test to

check for PSOL2 leak. Remove

and then reseat PSOL2

3.Replace PSOL2.

4.Perform a flow sensor calibra-

tion.

5.Replace Q2.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0204Wall air pressure

not detected EST Gas

Supply/SV Test

Failure Wall air not detected

initially and wall air still

not detected after user

was prompted to

connect wall air.

1.Make sure air supply is con-

nected.

2.Check PS2: Remove the wiring

connectors from PS2 and

jumper the connectors to each

other. If the system now rec-

ognizes the air supply, replace

PS2.

FE0205O2 pressure not

detected EST Gas

Supply/SV Test

Failure Oxygen pressure not

detected initially and

oxygen pressure still

not detected after user

was prompted to

connect oxygen.

1.Make sure oxygen supply is

connected.

2.Check PS1: Remove the wiring

connectors from PS1 and

jumper the connectors to each

other. If the system now rec-

ognizes the air supply, replace

PS1.

FE0206O2 pressure

detected (O2

not

disconnected)EST Gas

Supply/SV Test

Failure Oxygen pressure switch

detected presence of

oxygen after user was

prompted to

disconnect oxygen.

1.Make sure oxygen supply is dis-

connected.

2.Replace Inspiratory Electronics

PCB.

3.Replace PS1.

FE0207Air PSOL leak EST Gas

Supply/SV Test Failure Air PSOL (PSOL2)

forward leak was

detected via excessive

pressure buildup (>100

cmH2O) in blocked

inspiratory module.

1.Check for leaks around the Q2

O-rings.

2.Verify that the safety valve

relieves pressures above 100

cmH2O. Listen for the pressure

relief while watching the

numeric digital display of sys-

tem pressure in the upper

screen. If the safety valve does

not crack open, replace the

safety valve.

3.Replace PSOL2.

FE0208Wall air pressure

detected EST Gas

Supply/SV Test

Failure Wall air pressure switch

(PS2) detected wall air

after user was

prompted to

disconnect it.

1.Make sure air supply is discon-

nected.

2.Replace Inspiratory Electronics

PCB.

3.Replace PS2.

FE0209O2 PSOL leak EST Gas

Supply/SV Test Failure Oxygen PSOL (PSOL1)

forward leak was

detected via excessive

pressure buildup (>100

cmH2O) in blocked

inspiratory module.

1.Check for leaks around the Q1

O-rings.

2.Verify that the safety valve

relieves pressures above 100

cmH2O. Listen for the pressure

relief while watching the

numeric digital display of sys-

tem pressure in the upper

screen. If the safety valve does

not crack open, replace the

safety valve.

3.Replace PSOL1.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0210SV pressure

relief failed EST Gas

Supply/SV Test

Failure Safety valve cracking

pressure and/or peak

steady-state pressure is

out of range.

1.Make sure To patient port is

blocked.

2.Check for leaks at the O2 sen-

sor, SOL1 or PI.

3.Replace the safety valve.

4.Replace PI.

FE0211O2 pressure not

detected EST Gas

Supply/SV Test

Failure PS1 did not detect

oxygen after user was

prompted to connect it.

1.Make sure oxygen supply is

connected.

2.Replace Inspiratory Electronics

PCB.

FE0212Compressor

pressure

detected EST Gas

Supply/SV Test

Failure Compressor pressure

transducer (PC)

detected that

compressor was

pressurized.

Replace compressor PCB.

FE0215Air zero flow

check failed EST Gas

Supply/SV Test

Failure During zero-flow check,

air flow sensor (Q2)

reads >0.05 L/min.

1.Make sure gas supplies are dis-

connected.

2.Make sure compressor is not

running.

3.Verify no leaks at the Q2

O-rings.

4.Check for PSOL2 leak.

5.Remove and then reseat

PSOL2.

6.Perform a flow sensor calibra-

tion.

7.Replace PSOL2.

8.Replace Q2.

FE0216O2 zero flow

check failed EST Gas

Supply/SV Test

Failure During zero-flow check,

oxygen flow sensor

(Q1) reads >0.05 L/

min.

1.Make sure gas supplies are dis-

connected.

2.Make sure compressor is not

running.

3.Verify no leaks at the Q2

O-rings.

4.Check for PSOL2 leak.

5.Remove and then reseat

PSOL2.

6.Perform a flow sensor calibra-

tion.

7.Replace PSOL2.

8.Replace Q2.

FE0217Exp zero flow

check failed

EST Gas

Supply/SV Test

Failure During zero-flow check,

exhalation flow sensor

(Q3) reads >0.1 L/min.

1.Make sure gas supplies are dis-

connected.

2.Make sure compressor is not

running.

3.Verify no leaks at the Q3

O-rings.

4.Perform a flow sensor calibra-

tion.

5.Replace Q3.

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0301Excessive leak EST Leak Test Failure System pressure

dropped below failure

pressure level.1.Make sure test circuit is con-

nected and is not leaking.

2.Check for system leaks or

occlusions especially at the O2

sensor and expiratory filter. 3.Verify secure connection of

expiratory filter.

4.Check exhalation valve opera-

tion.

FE0305Unable to

establish

pressure EST Leak Test Failure System cannot attain

leak test starting

pressure using oxygen

or air within time-out

period.

1.Make sure test circuit is con-

nected and is not leaking.

2.Check exhalation valve opera-

tion, and verify secure connec-

tion of expiratory filter.

FE0401Accept key fails.EST GUI

Keyboard Test Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0402Clear key fails.EST GUI

Keyboard Test Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0403Insp. Pause key

fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0404Exp. Pause key

fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0405Man Insp fails.EST GUI

Keyboard Test Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0406100% O2/CAL

key fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0407Info key fails.EST GUI

Keyboard Test Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0408Alarm Reset key

fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0409Alarm Silence

key fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0410Alarm Volume

key fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0411Screen

brightness fails.

EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard. Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action

FE0412Screen contrast

key fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0413Screen lock key

fails.EST GUI

Keyboard Test

Failure Wrong key pressed or

key not pressed within

15 s.

1.Repeat test.

2.Replace keyboard.

FE0501Bad knob EST GUI Knob

Test Failure Knob was not turned in

direction as prompted

within 15 s.

1.Repeat test.

2.Replace keyboard.

FE0801SAAS

(Safety Audible

Alarm System)

test failed EST GUI Audio

Test

Failure CLEAR key pressed to

indicate GUI audio

diagnostic failed.

1.Verify the GUI alarm cable con-

nection to the GUI CPU PCB.

2.Replace GUI alarm assembly.

3.Replace GUI CPU PCB.

FE0901Bad alarm cable EST BDU Audio

Test Failure Alarm cable voltage is

out of range (<3.5 or

>5.05 V).

1.Make sure BD alarm cable is

connected.

2.Replace BD alarm.

3.Replace AI PCB.

4.Replace BD alarm cable.

FE0902Bad power fail

cap EST BDU Audio

Test

Failure Power failure capacitor

initial voltage is out of

range (<4.5 or >5.05

V).

1.Make sure BD alarm cable is

connected.

2.Replace BD alarm.

3.Replace AI PCB.

4.Replace BD alarm cable.

5.Replace Motherboard PCB.

FE0903Bad power fail

cap EST BDU Audio

Test

Failure Power failure capacitor

final voltage is out of

range or RC constant

<60 s.

1.Make sure BD alarm cable is

connected.

2.Replace BD alarm.

3.Replace AI PCB.

FE0904Bad BD audio EST BDU Audio

Test Failure CLEAR key pressed to

indicate user did not

hear alarm, although

alarm was active.

1.Make sure BD alarm cable is

connected.

2.Replace BD alarm.

3.Replace AI PCB.

4.Replace BD alarm cable.

FE1101Safety valve

occluded EST Safety

System Test

Failure Excessive safety valve

back pressure when

safety valve is open.

Replace safety valve.

FE1102Bad safety valve

driver or

loopback EST Safety

System Test

Failure Safety valve loopback

current is out of range

during one or more of

timed test points.

1.Replace safety valve.

2.Replace AI PCB.

3.Replace Inspiratory Electronics

PCB.

FE1103Insp check valve

test failed EST Safety

System Test

Failure It took too long to

relieve excess pressure

through open safety

valve, indicating

inspiratory check valve

(CV3) is occluded or

test circuit is too large.

1.Make sure proper test circuit is

used.

2.Make sure CV3 is not installed

backward.

3.Replace CV3.

4.Replace Safety Valve (SV).

Table 6-2: 840 Ventilator diagnostic codes (continued)

Code Message

displayed

Test Response

Information / Possible

cause

Corrective action