Haier MRV II - Page 51

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