Gree SEER10 Series, Technical & Service Manual

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Household Unit Technical Service Manual
20
3.2.2 Fault Analysis
Fault Possible Cause How to Eliminate Fault Possible Cause How to Eliminate
Power failure
Resume the power
supply
4-way valve failure Replace the 4-way valve
Short circuit
Eliminate short circuit;
replace the fuse
The thermal
expansion valve is
blocked.
Replace the thermal
expansion valve.
Leakage between high
pressure and low pressure
section of the compressor
Replace the compressor
The pipe valve is not full
open
Open the valve to full
Fu
se
is
b
ur
n
t
Earth failure
(Damaged
insulation)
Eliminate the earth
failure or replace the
cable
Leakage of refrigerant
Find the leaking point and add
refrigerant
Eliminate the cause of
poor contact
The power plug is not
inserted properly or the
contact is poor
Insert into the socket
firmly
The
cooling is
poor
under
COOL
mode
operation.
The heat insulation of
connecting pipe between
indoor unit and outdoor unit
is poor
Heat insulate the gas pipe and
liquid pipe separately
The heating load is too
high
Check the predicted heating
load
Wrong cable connection
between indoor unit and
outdoor unit
Check the circuit
according to wiring
diagram and connect
correctly.
The temperature setting is
too low
Increase the temperature setting
The controller fuse is
burnt
Replace the controller
fuse
The installation position of
outdoor unit is improper
The outdoor side shall have
good ventilation and installed
with sunshade.
Neither the
indoor unit
nor the
outdoor unit
can work
The controller is burnt Replace the controller The indoor filter is blocked Clean the filter periodically.
The indoor heat exchanger
is blocked
Wash the outdoor heat
exchanger The indoor fan motor is
burnt or disconnected
Repair or replace the fan
motor
The air through indoor heat
exchanger is low
Increase the motor speed and
set it to HIGH or MED.
Compressor failure Replace the compressor
When
switched to
FAN position,
the fan does
run
Remote controller failure
Eliminate the fault or
replace the controller
4-way valve failure Replace the 4-way valve
Replace the 1-way valve
Replace the 1-way valve
The thermal
expansion valve is
blocked.
Replace the thermal
expansion valve.
The coil is
broken
Defrosting is not thorough
Replace the defrost temp.
sensor
The pipe valve is not full
open
Open the valve to full
The refrigerant is low
Find the leaking point and add
refrigerant
Under COOL
or HEAT
mode, neither
the outdoor
fan nor the
compressor
works
Relay
failure
The contact is
poor
Replace the relay
The
heating is
poor
under
HEAT
mode
operation.
The 1-way
valve of
outdoor
unit leaks
The heat insulation of
connecting pipe between
indoor unit and outdoor unit
is poor
Heat insulate the gas pipe and
liquid pipe separately
Failure of outdoor fan
motor
Replace the motor
The indoor fan touches
other substances
Adjust the fan position
Failure of outdoor relay Replace the relay
Under COOL
or HEAT
mode, the
compressor
runs but the
outdoor fan
does not run
The defrost temp. sensor
and tube temp. sensor
are in poor contact
Replace the defrost
temp. sensor and tube
temp. sensor
The compressor vibration
is too high
Adjust the compressor support
and tighten the loose bolts
Compressor failure Replace the compressor
Foreign articles inside the
indoor unit
Remove the foreign articles
Avoid mounting on steel window
directly
Wall with appropriate strength
Under COOL
or HEAT
mode, the
outdoor fan
runs but the
compressor
does not run
The compressor
capacitor is burnt
Replace the capacitor
The indoor unit is installed
on plate wall or thin wall
thus generating high
resonance noise
Take proper measures to reduce
the vibration.
Cooling load is too high
Check the predicted
cooling loads.
The outdoor pipes knock
each other
Separate the knocking pipes
Temperature setting is
too high
Lower the temperature
setting
Tighten the screws
The metals inside the unit
knock each other
Add damping glue between
metal plates.
The outdoor fan knock the
casing
Adjust the fan position
Cooling unit is installed
at an improper position
The outdoor side shall
have good ventilation
and installed with
sunshade.
Abnormal noise inside the
compressor
Replace the compressor
The indoor filter is
blocked
Clean the filter
periodically.
The indoor heat
exchanger is blocked
Wash the heat
exchanger
The cooling
is poor under
COOL mode
operation.
The fan speed setting is
too low
Set to HIGH or MED
speed
Abnormal
noise or
vibration
Under HEAT mode
operation, abnormal
electromagnetic noise is
heard in the 4-way valve
The electromagnetic valve is
short circuited. Replace the
electromagnetic valve.