229
1U71S2SG1FA
Flash times of LED
on mainboard
Touble descipion Analyze and diagnose
1 Eeprom failure Outdoor main board eeprom fail
2 IPM failure IPMfailure
4
Communication eror between main boarc
and spdumodule SPDU Communicatior
error
Comunication fail over 4min
5 High pressure protection System high pessure over 4. 15 Mpa
6
Module over-voltage protection (only for
Spdu)Module lack-voltage potecion (only
for Spdu)
Send from Spdu module
8
Compressor discharging temperature
protecio
Compressor discharging temperature over 110
centigrade
9 Abnormalof DC motor Jam of DC motor or motor failure
10 Abnomal of piping sensor Piping sensor short-circuit or open-circuit
11
Suction temperature sensor failure Suction temperature sensor short or open-circuit
or the compressor connection is poor
12 Abnormal of oudoor ambient sensor Outddoor ambient short-circuit or open-circuit
13 Abnormal of outdoor ambient sensor Compressor discharge sensor short-circuit
15
Communication error between indoor and
outdoor unit
Communication fail over4min
16 Lack of efrigerant check if there is leakage in the unit
17 4-way valve reverse lure
Alarm and stop ifdetect Td-Tci<=15 last for 1min
afte compressor has started for 10min in heating
mode,confrmthe lurlel it appears 3times in one
hour.
18 Compressor jam(only for spdu) Iner compressor is abnomal jamed
19 Module PWM select circuit error Module PWM select crcuil eor
25 Compressor U-phase over-urrent The curent of comressol U-phase is too high
25 Compressor V-phase over-current The curent of comressol V-phase is too high
25 Compressor W-phase over-current The curent of compressol W-phase is too high
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