72
Outside Unit
Test Run
n
Refer to the troubleshooting guide of service technical manual for each error.
Display
Error item
Root cause of error
number
Slave1 outside unit liquid pipe temperature sensor disconnection or
short circuit
Slave2 outside unit liquid pipe temperature sensor disconnection or
short circuit
Master outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
Slave1 outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
Slave2 outside unit over-cooling inlet temperature sensor disconnec-
tion or short circuit
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 3 2
Slave1 outside unit liquid pipe temperature
sensor error
1 1 3 3
Slave2 outside unit liquid pipe temperature
sensor error
1 1 4 1
Master outside unit over-cooling inlet tempera-
ture sensor error
1 1 4 2
Slave1 outside unit over-cooling inlet tempera-
ture sensor error
1 1 4 3
Slave2 outside unit over-cooling inlet tempera-
ture sensor error
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