Specifications

274
Defective indoor unit PCB → Replace.
NO
YES
YES
(1)
Defective SVH (high
pressure gas side solenoid
valve) → Replace.
NO
YES
Defective relay (XH) → Replace.
Defective relay → Replace.
Is heat
outputted?
NO
Are solenoid
valve control relays
(XH1~6)
OK?
Is AC 220/240V
applied at flow divide
controller connector
CnB?
Heating operation does not start
4)
Note (1) This is applicable only when a central flow
divide controller is used.