248
18. Failure code
Failure code description: (failure code of the whole system is showed as 8 bits, so totally 256 codes. Indoor failure code
should be judged by the table and the unit number)
• Outdoor failure code exists in EEPROM, in which 5 failure codes can be kept.
• Indoor failure code exists in EEPROM, in which 5 failure codes can be kept.
Failure codes are distributed as following:
0~19: indoor failure code
20~99: outdoor failure code
100~109: DC motor failure code
110~125: inverter module failure code
126~127: software auto-check failure code
Physical master unit:
DIP switch SW9, SW10, SW11 are at 0, 0, 0, LD displays failure code 20~127, it is the master failure code.
DIP switch SW9, SW10, SW11 are 1, 0, 0, LD displays failure code 20~127, it is failure code of No. 1 slave unit.
DIP switch SW9, SW10, SW11 are 2, 0, 0, LD displays failure code 20~127, it is failure code of No. 2 slave unit.
Physical slave unit:
DIP switch SW9, SW10, SW11 are at 0, 0, 0, LD displays failure code 20~127, it is single slave unit failure code.
Outdoor failure code display principle on wired controller:
When outdoor compressor is running, indoor wired controller will display the failure code of outdoor with higher
priority. When compressor stops, it displays all indoor failures. The indoor failures will be classified as below: sensor
failure, inverter board failure, fan motor driving board failure, any protections
Inverter outdoor unit failure code indication on master unit
LED indication
on master unit
Indication
on wired
controller
(hex)
Failure code definition Failure description Remarks
20-0 14
Twi water inlet temp. failure of the water
heat exchanger
AD value is detected below 11 (open circuit) or
above 1012 (short circuit) for 60 secs. No handling
of this abnormal sensor when cooling mode is
operating.
Resumable
20-1 14
Two2 water outlet temp. failure of the
water heat exchanger
To Next Page
Loading...
