11
Measure
the
insulation
resistance
by
meg-ohm meter,
if the insulation
resistance < 1
MΩ,the
unit
can’t be used for
long time.
The winding is
burnt.
Power supply voltage
The voltage is
too low.
(Maybe
lower
than 175V)
Compressor
can’t
start
because of under
voltage.
Compressor
can
run
Cooling system
There
is
no
sound
of
refrigerant
flowing
in
cooling system
and it leaves oil
on the welding
point
Leakage
of
refrigerant
There
is
no
sound
of
refrigerant
flowing
in
cooling system
and no oil on the
welding point.
Inside leakage of
cooling pipe or
the
pipe
is
blocked.
Compressor
No
air
is
discharged
out
on
the
discharging
mouth
of
the
compressor.
Compressor
valve
is
breakdown
There
is
abnormal sound
inside
compressor
Compressor
is
breakdown
(B)
、
Compressor
Incorrect using
Check the thickness of frost(>5mm?)
The frost is too
thick
