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52 Outdoor Unit
Pipe connections between indoor and outdoor unit
Vacuum Mode
This function is used for creating vacuum in the system after compressor replacement, ODU parts replace-
ment or IDU addition/replacement.
Master unit PCB DIP switch on
- Heat pump : switch on 11, 14
- Cooling only : switch on 11, 14
Vacuum mode setting
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
ODU power reset
Press the black button Main PCB (5 sec.)
Vacuum mode setting method Vacuum mode cancellation method
Master unit PCB DIP switch off
- Heat pump : switch off 11, 14
- Cooling only : switch off 11, 14
Power reset
Vacuum mode cancellation
CAUTION
ODU operation stops during vacuum mode. Compressor can't operate.
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
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