ENGLISH
Installation Manual 81
Test Run
■ Refer to the troubleshooting guide of service technical manual for each error.
Display
Error item Root cause of error
number
Master outside unit over-cooling outlet temperature sensor disconnec-
tion or short circuit
Slave1 outside unit over-cooling outlet temperature sensor disconnec-
tion or short circuit
Slave2 outside unit over-cooling outlet temperature sensor disconnec-
tion or short circuit
Outside unit 4 way valve switch error
Master outside unit static speed compressor burn, locking and over-
current
Slave1 outside unit static speed compressor burn, locking and over-
current
Slave2 outside unit static speed compressor burn, locking and over-
current
Plate type heat exchanger freeze prevention error
Water temperature sensor open/short
Communication error between main MICOM and sub MICOM
1151
Master outside unit over-cooling outlet temper-
ature sensor error
1152
Slave1 outside unit over-cooling outlet temper-
ature sensor error
1153
Slave2 outside unit over-cooling outlet temper-
ature sensor error
1 5 1 - Outside unit 4 way valve switch failure
1731
Master outside unit static speed compressor
error
1732
Slave1 outside unit static speed compressor
error
1733
Slave2 outside unit static speed compressor
error
1 8 0 - Plate type heat exchanger freeze prevention
1 8 1 - Water temperature sensor error
1 8 2 - Communication error between MICOMs
Outside unit
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