950-0211revA - 22 - March 7, 2014
TROUBLESHOOTING
Indoor Unit Error Code Display
Display
LED STATUS
E0
Indoor unit EEPROM parameter error. / Disconnect power for 3 minutes then restart. If
“EO” appears again replace PC board.
E1
Indoor - outdoor units communication error. / Check for cross wiring and wire continuity.
If OK replace the PC board.
E2
Zero-crossing signal detection error. / Check compressor resistance. Replace indoor
PCB.
E3
Indoor fan speed has been out of control. / Replace indoor PCB (and /or) indoor fan
motor.
E4
Indoor room temperature sensor T1 open or short circuit. / Replace indoor room
temperature sensor (and /or) replace indoor PCB.
E5
Evaporator coil temperature sensor T2 open circuit or short circuit. / Replace evaporator
coil temperature sensor (and /or) replace indoor PCB.
EC
Refrigerant leakage detection / Find leak and repair (and /or) replace indoor PCB.
F1
Outdoor temperature sensor T4 open circuit or short circuit / Replace outdoor
temperature sensor (and /or) replace indoor PCB.
F2
Condenser coil temperature sensor T3 open circuit or short circuit. / Replace condenser
coil temperature sensor (and /or) replace indoor PCB.
F3
Compressor discharge temperature sensor T5 open circuit or short circuit / Replace
compressor discharge temperature sensor (and /or) replace indoor PCB.
F4
Outdoor unit EEPROM parameter error / Disconnect power for 3 minutes then restart. If
problem persists replace outdoor PC board.
P0
IPM malfunction or IGBT over current protection. / Check compressor winding
resistance (0.7ohm), coil to coil and to gnd. Compressor windings should read low ohms,
zero ohms = short, open = break in winding. If OK replace IPM module (and /or) replace
outdoor PCB.
P1
Over voltage or over low voltage protection. / Check supply voltage, if this is not the
problem replace outdoor PCB.
P2
High temperature protection of compressor top diagnosis and solution (only for 24K
model) / Check refrigerant, compressor hi temp. switch. If OK replace outdoor sensor
and PCB.
P4
Inverter compressor drive error. / Check IPM module, compressor resistance (0.7ohm),
coil to coil and to gnd.
