ENGLISH
Installation Manual 81
Test Run
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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
1 1 5 1
Master outside unit over-cooling outlet temper-
ature sensor error
1 1 5 2
Slave1 outside unit over-cooling outlet temper-
ature sensor error
1 1 5 3
Slave2 outside unit over-cooling outlet temper-
ature sensor error
1 5 1 - Outside unit 4 way valve switch failure
1 7 3 1
Master outside unit static speed compressor
error
1 7 3 2
Slave1 outside unit static speed compressor
error
1 7 3 3
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
