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