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ENGLISH
Installation Manual 53
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
Switch on : 10, 12, 13
Vacuum mode setting
ODU valve open,
Main EEV, SC EEV open
IDU EEV open
HR unit valve open, SC 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
Switch off : 10, 12, 13
Power reset
Vacuum mode cancellation
CAUTION
ODU operation stops during vacuum mode. Compressor can't operate.
Refrigerant piping system
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