GE AIR C18, Service Manual-Installation

Page: 60 / 60

—
57
—
Trouble-Shooting
Air –conditioning unit
cannot be started
Trip of circuit
breaker or
burn-out of
fuse
When set short-circuiter
as
“
ON
”
, it trips
immediately
Check insulation resistance for
grounding; Confirm if
air-conditioning unit has electrical
leakage or is short-circuited
When turning the air-conditioning unit
to the
“
ON
”
status, trip of circuit
breaker occurs several minutes later
Check circuit breaker,
measure resistance
for short-circuit
Both indoor
unit and
outdoor unit do
not start
No power supply Check power supply status
Emission failure of remote controller
Check remote controller
Serial communication failure between
indoor unit and outdoor unit
Winding protection function of
compressor is activated
Open circuit of sensor or moderation
function is activated
Failure of switch assembly unit
Poor cooling
Check if the set
temperature is
appropriate
Decrease upper
point set
temperature
Check if the cooling
load is appropriate
Check the
forecasted
cooling load
4-way value
failure
Replace
4-way valve
failure in flow
of refrigerant
Insufficient
refrigerant
Charge
refrigerant
Compressor
failure
Replace
Compressor
Insufficient flow
through pipeline
valve
Fully open
the valve
Block in air filter
Clean the
filter grill
Insufficient
air circulation
volume
Check if the fan
speed is set too
low
Set fan speed
as high or
medium
Poor thermal insulation of
refrigerant connecting pipe
between outdoor unit and
indoor unit
Big pipe and small
pipe shall have
separate thermal
insulation
Poor heating
Check if the set
temperature is
appropriate
Increase the set
temperature
Check if the heating
load is appropriate
Check the
forecasted
heating load
4-way value
failure
Replace
4-way valve
failure in flow
of refrigerant
Insufficient
refrigerant
Charge
refrigerant
Compressor
failure
Insufficient flow
through pipeline
valve
Fully open
the valve
Block in air filter
Clean the
filter grill
Small air
circulation
volume
Check if the fan
speed is set too
low
Increase fan
speed
Poor thermal insulation of
refrigerant connecting pipe
between outdoor unit and
indoor unit
Big pipe and small
pipe shall have
separate thermal
insulation
Replace
Compressor