Haier MRV II - 4. Trouble diagnose and trouble shooting

- 50 -
commissioning)
4 Familiar trouble during commissioning and shooting method
4.1 Indoor trouble diagnose and trouble shooting
No.
trouble
exhibition
trouble
diagnose
trouble
shooting
remark (trouble
diagnose
method)
indoor gas
pipe TC1
（three core,
green）, liquid
pipe TC2
（three core,
black）sensor
are inserted
conversely,
pushed off or
with wrong
resistance
value
check
sensor
position,
resistanc
e
value(te
mp. 25,
TC1/TC2
is 10KΩ)
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
phase
sequence of
EEV is
converse,
SW08-7 is
ON
change
SW08-7 to
OFF
1
indoor
does not
cool, or
cooling
effect is
not good
evaporator is
blocked by
weld or dirt
valve action
is normal
but no
effect,
collect the
refrigerant
and charge
nitrogen to
check and
clean the
sundries
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