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No.
trouble
exhibition
trouble
diagnose
trouble
shooting
remark (trouble diagnose
method)
1
indoor
does not
cool, or
cooling
effect is
not good
system
lack of
refrigerant
refer to
the
standard,
calculate
the
amount
according
of pipe
length,
supply
refrigerant
observe indoor
TC1/TC2/EEV by dipswitch,
TC1 is much higher than
TC2, EEV is displayed open
fully, when unit startup, voice
of refrigerant flow can be
heard, outdoor discharging
temp. is high, suction and
discharging pressure is
rather low a
indoor EEV
can not be
open
the
treatment
is the
same with
problem
in cooling
at the beginning TIC is high,
TC2 is close to room temp.,
when the running become
stable, TC1 and TC2 are
close to room temp., EEV is
displayed open fully, voice
about refrigerant flow can not
be heard when startup
evaporator
is blocked
by weld or
dirt
treatment
is same
as
problem
in cooling
2
outdoor
does not
heat, or
heating
effect is
not good
system
lack of
refrigerant
treatment
is same
as
problem
in cooling
observe indoor
TC1/TC2/EEV by dipswitch,
TIC and TC2 are low, EEV is
displayed open fully, voice of
refrigerant flow can be heard
when startup, outdoor
discharging temp. is high,
suction/discharging pressure
are all low
No. trouble trouble diagnose trouble remark (trouble
Part 2
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