Installation
56
56
Display
Error item
Root cause of error
number
Master outside unit liquid pipe temperature sensor disconnection or short cir-
cuit
Slave1 outside unit liquid pipe temperature sensor disconnection or short cir-
cuit
Slave2 outside unit liquid pipe temperature sensor disconnection or short cir-
cuit
Master outside unit over-cooling inlet temperature sensor disconnection or
short circuit
Slave1 outside unit over-cooling inlet temperature sensor disconnection or
short circuit
Slave2 outside unit over-cooling inlet temperature sensor disconnection or
short circuit
Master outside unit over-cooling outlet temperature sensor disconnection or
short circuit
Slave1 outside unit over-cooling outlet temperature sensor disconnection or
short circuit
Slave2 outside unit over-cooling outlet temperature sensor disconnection or
short circuit
1
Master outside unit liquid pipe temperature sensor
error
1 1 3 2
Slave1 outside unit liquid pipe temperature sensor
error
3
Slave2 outside unit liquid pipe temperature sensor
error
1
Master outside unit over-cooling inlet temperature
sensor error
1 1 4 2
Slave1 outside unit over-cooling inlet temperature
sensor error
3
Slave2 outside unit over-cooling inlet temperatur
sensor error
1
Master outside unit over-cooling outlet tempera-
ture sensor error
1 1 5 2
Slave1 outside unit over-cooling outlet tempera-
ture sensor error
3
Slave2 outside unit over-cooling outlet tempera-
ture sensor error
Outside unit
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Refer to the troubleshooting guide of service technical manual for each error.
1 5 1 - Outside unit 4 way valve switch failure
Outside unit 4 way valve switch error
1 Master outside unit static compressor error
Master outside unit static speed compressor burn, locking and over-current
1 7 3 2 Slave1 outside unit static compressor error
Slave1 outside unit static speed compressor burn, locking and over-current
3 Slave2 outside unit static compressor error
Slave2 outside unit static speed compressor burn, locking and over-current
1 8 0 - Plate type heat exchanger freeze prevention
Plate type heat exchanger freeze prevention error
1 8 1 - Water temperature sensor error
Water temperature sensor open/short
1 8 2 - Communication error between MICOMs
Communication error between main MICOM and sub MICOM