Specifications

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(13) Operation Mode
1) Operating modes of the indoor unit
The following five modes can be set by the remote control.
Cooling mode
Heating mode
Dry mode
Fan mode
Stop mode
2) Operating modes of the outdoor unit
The following are the 3 modes for the outdoor unit.
Cooling mode All indoor units are operated in cooling mode
Heating mode All indoor units are operated in heating mode
Stop mode All indoor units are in fan or stop mode
Note: If the outdoor unit has been in the cooling mode and the other indoor units (in stop, fan, thermostat off) are
to the heating mode, those indoor units will not be operated and the heating indicator will be flashed
remote controller. The reverse also applies when the outdoor unit is operated in the heating mode
on the
cooling indicator will be flashed on the remote controller.
(14) Emergency response operating mode
The emergency operation mode is a mode in which the unit is run in an emergency to respond to the trouble when
compressors (No. 1, No. 2) break down, making it possible to carry out a trouble reset using the remote control.
the
1) Starting the Emergency Operation Mode
Trouble occurs (Display the trouble code root and trouble code on the remote control).
Carry out trouble reset with the remote control.
If the trouble indicted in above is of the kind that permits emergency operation (see the table below), initiate
y operation.
If the trouble indicated in above is of the kind where emergency operation is impossible (see the table below),
restart operation after carrying out the previous trouble reset (without entering the emergency operation mode).
If the same trouble is detected again during the retry operation in above, carry out trouble reset once more
with the remote control, then try emergency operation starting corresponding to the contents of the trouble.
Table Emergency Operation Mode Patterns and Trouble Codes for which Emergency Operation is Possible or Impossible
Caution
During emergency operation, only marked percentage of indoor units can be operated during emergency operation
.
In case, more than marked percentage of indoor units are operated, over than the percentage of indoor units
would be on the stand-by mode.
Codes for which emergency operation is
possible.
Emergency Mode
Pattern
Trouble Codes for which
Emergency Operation is
Impossible
Action
When a No. 1
Compressor Failure
Occurs
When No. 2
Compressor Failure
Occurs
Trouble codes other than
those at left.
Emergency Operation only with the
No. 2 Compressor
* After the retry operation, even if
there is a different trouble code
detected within <Inverter
Trouble> at left, press the button
and after resetting, start the unit
by emergency operation.
[Example]
4250 Reset Retry 4240
Reset Emergency
operation
Emergency Operation only with the
No. 1 Compressor
Overcurrent protection
400 500
No. 1 Compressor Failure 48 % 65 %
No. 2 Compressor Failure 65 %
65 %
set
and the
a retr
Serial transmission trouble 0403
VDC sensor/circuit trouble 4200
Bus voltage trouble 4220
Radiator panel overheat
protection 4230
Overload protection 4240
4250
IPM Alarm output/
Bus voltage trouble/
Over Current Protection
Cooling fan trouble 4260
Thermal sensor trouble
(Radiator panel)
5110
IAC sensor/circuit trouble 5301
1
1
2
2
3
3
1
1
1
3
2
3
4
4
5