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5-2. PAC System Alarm Codes
2. Outdoor
Alarms for outdoor units
Alarm
Code
E04
Error in Indoor Unit Receiving Signal from the Outdoor Unit
F04
Compressor Discharge Temperature Sensor (TD) Trouble
F06
Inlet Temperature Sensor (C1) in Heat Exchanger Trouble
F08
Outdoor Air Temperature Sensor (TO) Trouble
H01
Primary (input) Overcurrent Detected
H02
PAM Trouble
H03
Primary Current CT Sensor (current sensor) Failure
L18
4-Way Valve Operation Failure
P03
Compressor Discharge Temperature Trouble
P04
High Pressure Trouble
P05
AC Power Supply Trouble
P07
HIC (IPM) Temperature Trouble
P13
Alarm Valve Open
P15
Insufficient Gas Level Detected
P16
Compressor Overcurrent Trouble
P22
Outdoor Unit Fan Motor Trouble
P29
Lack of INV compressor wiring, INV compressor actuation failure (including locked), DCCT failure
Alarm Meaning
5-2-2-1
5
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