Indoor Trouble Diagnose And Trouble Shooting - Haier MRV II Instruction Manual

commissioning)
4 Familiar trouble during commissioning and shooting method

4.1 Indoor trouble diagnose and trouble shooting

trouble
No.
exhibition
indoor
does not
cool, or
1
cooling
effect is
not good
trouble
diagnose
indoor gas
pipe TC1
（three core,
green）, liquid
pipe TC2
（three core,
black）sensor
are inserted
conversely,
pushed off or
with wrong
resistance
value
phase
sequence of
EEV is
converse,
SW08-7 is
ON
evaporator is
blocked by
weld or dirt
- 50 -
trouble
shooting
check
sensor
position,
resistanc
e
value(te
mp. 25 ,
TC1/TC2
is 10KΩ)
change
SW08-7 to
OFF
valve action
is normal
but no
effect,
collect the
refrigerant
and charge
nitrogen to
check and
clean the
sundries
remark (trouble
diagnose
method)
observe the
changing trend
of indoor
TC1/TC2/EEV
by dipswitch:
EEV open angle
become big,
TC1 become
low, open angle
become small,
TC2 become
high
observe indoor
TC1/TC2/EEV
by dipswitch,
after system
become stable,
EEV is
displayed open
fully, when the
unit startup, you
can not hear any
voice about
refrigerant flow
Part 2