Fault Analysis - Gree SEER13 Series Technical & Service Manual

Household Unit Technical Service Manual

3.2.2 Fault Analysis

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