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80 Outside Unit
Test Run
Display
Error item Root cause of error
number
Initial operation failure due to slave1 outside unit Variable speed com-
pressor error
Initial operation failure due to slave2 outside unit Variable speed com-
pressor error
Compressor turned Off due to master outside unit inverter DC voltage
over-charge
Compressor turned Off due to slave1 outside unit inverter DC voltage
over-charge
Compressor turned Off due to slave2 outside unit inverter DC voltage
over-charge
Master outside unit Variable speed compressor error or operating com-
ponent (IPM) error operation
Slave1 outside unit Variable speed compressor error or operating com-
ponent (IPM) error operation
Slave2 outside unit Variable speed compressor error or operating com-
ponent (IPM) error operation
Compressor turned off due to master outside unit inverter CT under-
current
Compressor turned off due to slave outside unit inverter CT under-cur-
rent
Compressor turned off due to slave1 outside unit inverter CT under-
current
Compressor turned off due to master outside unit Variable speed com-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of master outside unit
Compressor turned off due to slave1 outside unit Variable speed com-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of slave1 outside unit
Compressor turned off due to slave2 outside unit Variable speed com-
pressor discharge temperature over-rise
Flow rate insufficiency or flow switch trouble of slave2 outside unit
Compressor turned off due to master outside unit Fixed speed com-
pressor discharge temperature over-rise
Compressor turned off due to slave1 outside unit Fixed speed com-
pressor discharge temperature over-rise
Compressor turned off due to slave2 outside unit Fixed speed com-
pressor discharge temperature over-rise
Compressor turned off due to master outside unit high pressure over-rise
Compressor turned off due to slave1 outside unit high pressure over-rise
Compressor turned off due to slave2 outside unit high pressure over-rise
Compressor turned off due to master outside unit low pressure over-
drop.
Compressor turned off due to slave1 outside unit low pressure over-drop.
Compressor turned off due to slave2 outside unit low pressure over-drop.
Failing to transmission between inverter Micom and converter Micom
of master outside unit
Failing to transmission between inverter Micom and converter Micom
of slave1 outside unit
Failing to transmission between inverter Micom and converter Micom
of slave2 outside unit
Master outside unit Variable speed compressor current detection (CT)
sensor disconnection or short circuit
262
Slave1 outside unit Variable speed compressor
operation failure error
263
Slave2 outside unit Variable speed compressor
operation failure error
281
Master outside unit inverter DC link over-volt-
age error
282
Slave1 outside unit inverter DC link over-volt-
age error
283
Slave2 outside unit inverter DC link over-volt-
age error
291
Master outside unit Variable speed compressor
over-current
292
Slave1 outside unit Variable speed compressor
over-current
293
Slave2 outside unit Variable speed compressor
over-current
311
Master outside unit inverter CT under-current
error
312
Slave outside unit inverter CT under-current
error
313
Slave1 outside unit inverter CT under-current
error
321
Master outside unit Variable speed compressor
discharge temperature over-rise
322
Slave1 outside unit Variable speed compressor
discharge temperature over-rise
323
Slave2 outside unit Variable speed compressor
discharge temperature over-rise
331
Master outside unit Fixed speed compressor
discharge temperature over-rise
332
Slave1 outside unit Fixed speed compressor
discharge temperature over-rise
333
Slave2 outside unit Fixed speed compressor
discharge temperature over-rise
3 4 1 Master outside unit high pressure over-rise
3 4 2 Slave1 outside unit high pressure over-rise
3 4 3 Slave2 outside unit high pressure over-rise
351
Master outside unit low pressure over-drop.
3 5 2 Slave1 outside unit low pressure over-drop.
3 5 3 Slave2 outside unit low pressure over-drop.
391
PFC Transmission error of master outside unit:
Inv.Micom ÷ Convertor Micom
392
PFC Transmission error of slave1 outside unit:
Inv.Micom ÷ Convertor Micom
393
PFC Transmission error of slave2 outside unit:
Inv.Micom ÷ Convertor Micom
401
Master outside unit Variable speed compressor
CT sensor error
Outside unit
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