Haier MRV II Instruction Manual page 51

exhibition
outdoor
does not
heat, or
2
heating
effect is not
good
one wired
controller
control one
indoor, wired
controller
3
shows 8888
circularly
and can not
recover
No. trouble
pipe is too long ,
or the height
between indoor
units is more than
standard
Outdoor 4-way
valve
turbulence results
in high/low
pressure too low.
action of outdoor
EEV action is not
good, or outdoor
EEV being
damaged due to
the wrong
connection of air
suction temp.
sensor
SW01 on PCB
does not at "0"
CN30 on PCB
does not be
short connected
trouble
- 52 -
shooting
change the
units
according
of the use
manual, or
add a
electric
heater
in change
4-way
valve
connect
air suction
temp.
sensor
reliably or
change
EEV of
outdoor
change
SW01 to
" 0 "
make
CN30
short
connection
trouble
diagnose method)
high/low pressure
are too low, and
can not rise even
supply refrigerant,
indoor TC1/TC2 is
too low, condenser
pipes are warm
EEV can not adjust
normally, and
usually show open
or close fully, you
can feel the
temperature
difference in front
of or back of the
EEV under
different
conditions.
dip switch
master wired
controller must be
set to "0"
Part 2
remark
of