Mitsubishi Electric CITY MULTI PUHY-400YMF-C Service Handbook page 90

(Example 4)
A-minute
ON/OFF of
No.1 compressor
ON/OFF of
No.2 compressor
ON/OFF of
No.3 compressor
Note 1: If Step 4 is interrupted (compressor stopped by thermostat OFF or regular stop), Step 4 will be redone
at restar t.
Note 2: If Step 5 is interrupted, Step 5 will be redone at restart after performing Step 4 several times.
Note 3: If Step 6 is interrupted, Step 5 and Step 6 will be redone at restart after performing Step 4 several times.
Note 4: During Step 6, the No. 3 compressor runs with Un-load operation.
(15) Operation Mode
1) Operating modes of the indoor unit
The following five modes can be set by the remote control.
1
Cooling mode
2
Heating mode
3
Dry mode
4
Fan mode
5
Stop mode
2) Operating modes of the outdoor unit
The following are the 3 modes for the outdoor unit.
1
Cooling mode
2
Heating mode
3
Stop mode
Note: If the outdoor unit has been in the cooling mode and the other indoor units (in stop, fan, thermostat off) are
set to the heating mode, those indoor units will not be operated and the heating indicator will be flashed
on the remote controller. The reverse also applies when the outdoor unit is operated in the heating mode
cooling indicator will be flashed on the remote controller.
and the
5
Less than
minutes
10 minutes
Step 4
Step 5
Step 6
Step 4
Note 4
Step 5
All indoor units are operated in cooling mode
All indoor units are operated in heating mode
All indoor units are in fan or stop mode
-87-
5
Less than
minutes minutes
10 minutes
Step 4
Step 6
Note 4
.
5
End of initial operation mode
10
minutes
Note 3
Step 6
Note 4
Step 5