Diagnostic Code - Haier AB12CS1ERA Service Manual

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4. Diagnostic code

1U24GS1ERA 1U28GS2ERA(S)
Flash times
of LED on
mainboard
1 Eeprom failure
2 IPM failure
Communication error between main board
4
and spdu module SPDU Communicition error
5 High pressure protection
Module over-voltage protection(only for Spdu)
6
Module lack-voltage protection(only for Spdu)
Compressor discharging temperature
8
protection
9 Abnomal of DC motor
10 Abnomal of pipe sensor
12 Abnomal of outdoor ambient sensor
13 Abnormal of compressor discharge sensor
14 Suction temperature too high
Communication error between indoorand
15
outdoor unit
16 Lack of refrigerant
17 4-way valve reverse failure
18 Compressor jam (ony for spdu )
19 Module EEV select circuit error
22 protection of prevent indoor unit freeze
25 Compressor U-phase over-current
25 Compressor V-phase over-current
25 Compressor W-phase over-current
45 Low pressure protection
Trouble description Analyze and diagnose
Outdoor main board eeprom fail
IPM failure
Communication fail over 4 min
System high pressure over 4.15 Mpa
Send from Spdu module
Compressor discharging temperature over 110
centigrade
Jam of DC motor or motor failure
Piping sensor short-circuit or open-circuit
Outdoor ambient sensor short-circuit or open-
circuit
Compressor discharge sensor short-circuit or
open-circuit
Suction temperature too high (over 40℃ after
compressor running 10 minutes)
Communication fail over 4 min
check if there is leakage in the unit
Alarm and stop if detect Td-Tci<=15 last for 1min
after compressor has started for 10min in heating
mode, confirm the failure if it appears 3 times in
one hour.
Inner compressor is abnormal jamed
Module EEV select wrong circuit
Indoor piping temperature too low
Air outlet or inlet blocked of indoor unit
The current of compressor U-phase is too high
The current of compressor V-phase is too high
The current of compressor W-phase is too high
System over pressure under 0.05Mpa
375