![background image](http://html1.mh-extra.com/html/caire/equinox-paos-4000/equinox-paos-4000_provider-technical-manual_3343956023.webp)
Personal Ambulatory Oxygen System
Provider Technical Manual
20771733 D 23
Malfunction Codes
If a malfunction occurs in the eQuinox, the device will stop, the Red LED on the front panel will light and the buzzer will sound for 10 seconds
and then silence. The LCD will display one of the following Malfunction Codes:
Malfunction
FAIL code
Recommended Action
Invalid RESET
FAIL 80
Check for secure communication cables, Verify functionality of PM and CS PCB
I/O Port Failure
FAIL 81
Check for secure communication cables, Verify functionality of PM and CS PCB
RAM Failure
FAIL 82
Check for secure communication cables, Verify functionality of PM and CS PCB
FLASH Failure
FAIL 83
Check for secure communication cables, Verify functionality of PM and CS PCB
EEPROM Failure
FAIL 84
Check for secure communication cables, Verify functionality of CS PCB
IPC Watchdog Timeout
FAIL 90
Check for secure communication cables, Verify functionality of PM and CS PCB
Compressor Motor Temperature Sensor Failure
FAIL 91
Allow eQuinox to Cool for 30 Minutes. Check compressor fan functionality. Check to ensure vents are not
obstructed. Verify functionality of the Compressor Assy. Check cable connections between the compressor
and the PM PCB
PCB Temperature Sensor Failure
FAIL 92
Allow eQuinox to cool for 30 Minutes. Verify functionality of PM fan. Check to ensure vents are not
obstructed. Verify functionality of PM PCB
No Power to Compressor
FAIL 93
Check Compressor wires for damage. Verify functionality of PM PCB. Verify functionality of the Compressor
Assy
Compressor Motor Stalled
FAIL 94
Check Compressor wires for damage. Verify functionality of PM PCB. Verify functionality of the Compressor
Assy
Battery Communication Failure
FAIL 95
Verify functionality of the Battery Bridge PCB. Check Battery and Battery Bridge PCB for pin damage. Verify
functionality of battery. Verify functionality of PM PCB
PSS failure
FAIL 96
Power Failure
Boost Converter Failure
FAIL 97
Verify Functionality of PM PCB
Compressor motor too hot
FAIL 9A
Allow eQuinox to Cool for 30 Minutes. Check compressor fan functionality. Check to ensure vents are not
obstructed. Verify functionality of the Compressor Assy.
PCB too hot
FAIL 9B
Allow eQuinox to Cool for 30 Minutes. Check compressor fan functionality. Check to ensure vents are not
obstructed.
IPC Failure
FAIL A0
Verify functionality of PM PCB
Breath Pressure Sensor Failure
FAIL A2
Verify functionality of CS PCB
Ultrasonic Failure
FAIL A3
Verify functionality of CS PCB. Check for water intrusion from humidifier
Product Temperature Sensor Failure
FAIL A4
Verify functionality of DB9 cable harness. Verify functionality of CS PCB
Loss of Product Tank Pressure
FAIL A5
Check for leaking, cracked HEPA filter or damaged tubing. Verify ATF motor is turning
Purity Calibration Data Failure
FAIL A6
Check for leaking, cracked HEPA filter or damaged tubing. Verify functionality of CS PCB
Flow Calibration Data Failure
FAIL A7
Verify functionality of Proportional Valve. Verify functionality of CS PCB
Breath Sensitivity Data Failure
FAIL A8
Check for damaged tubing. Verify functionality of CS PCB
Over Current Failure
FAIL AB
Check power supply for sufficient current
Table 10
Step 1: Remove all power sources; battery and external power. Wait 20 seconds. Reconnect power to the eQuinox. Turn the device to the ON
position. If resolved, continue use.
Step 2: If unresolved, call Technical Support for assistance.