Haier MRV II Instruction Manual page 122

[38/40] high pressure protection (Pd sensor)
if characteristic of
high pressure sensors
are normal
yes
if stop va lve opens fully
yes
if in cooling outdoor
fan motor runs normally
yes
if heat exchanger
/filter are clogged or the
air flow is in short circuit
no
if SV3 bypass
circuit is normal
yes
A
no
no
no
if the connector,
capacitor,fan motor
are normal
yes
no
check if outdoor connecting
board is faulty, if yes, replace it
- 122 -
modify
stop va lve opens fully
no
modify
eliminate the abnormal reasons
modity the SV3 bypass circuit
Part 3