Haier MRV II Instruction Manual page 110

※ 3
if the other indoors
no
if fan motor runs
begin to run
yes
in heating mode, fan
wiring between
motor not run and
indoors and wired
"PRE HEAT"
cont roller is wrong
" DEFROST" on LCD
of wired controller will
be light.
1. in pre-heating
start up
2. in refrigerant oil
return control of
heat ing mode
3. in heating defrosting
4. TC2 sensor resistor
wrong
if indoor fan motor is
with AC 220V voltage
check the power source
voltage
remove the fan motor
wiring
if indoor motor winding
resistor is normal
if voltage among
yes B, C on wired
controller is AC
15V
no
yes
if the indoor
mot or runs
yes
no
if fan motor
rotation direction
is correct
1. filter clogged
2. indoor heat exchanger
clogged
yes
1. indoor PCB abnormal
2. wiring of indoor PCB is damaged or the port is not
inserted well
no
no
indoor motor abnormal
yes
if capacitor
capacity is
proper
wiring of indoor PCB is damaged or the port is not
inserted well
- 110 -
if voltage between
no
B and C on indoor
terminal block is
15V
yes
wiring between
indoors and wired
controller is wrong
f an capacitor abnormal
no
indoor f an capacitor abnormal
yes
Part 3
1. indoor PCB abnormal
no
2. wiring of indoor PCB
is damaged or the port
is not insert ed well