Haier MRV II - Page 120

Part 3
[30] high pressure switch circuit
- 120 -
A
modify
if high pressure switch acts
no
yes
no
no
no
no
no
no
yes
yes
yes
yes
yes
yes
yes
yes
no
no
no
no
if high pressure switch
is normal
check and replace if faulty
check and rewiring if faulty
if stop valve opens
if the wiring is normal
if service valve opens fully
if in cooling outdoor
fan motor runs normally
if the connector,
fan motor are normal
eliminate the abnormal reaso ns
if the heat exchanger
is clogged or the air flow is
in short circuit
if the high pressure
sensor is in back up runn ing
if SV3 bypass
circuit is normal
if the high pressure
sensor is normal
replace high pressure sensor
replace high pressure sensor
modity the SV3 bypass circuit
check if outdoor connecting
board is faulty, if yes, replace it