Hisense GBF18H-S User Manual page 101

7 . T R O U B L E S H O
7 . T R O U B L E S H O
Faul
t
Fault Description
cod
e
Expansion valve D (thin)tube
26
sensor fault
Expansion valve A （ thick
27
tube）sensor fault
Expansion valve B（ thick
28
tube） sensor fault
Expansion valve C（ thick
29
tube） sensor fault
Expansion valve D （ thick
30
tube）sensor fault
The discharge pressure is too
31
high
The suction pressure is too low
32
fault
high pressure and low
40 pressure imbalance before
compressor start
ON/OFF UNITARY AIR CONDITIONER TECHNICAL& SERVICE MANUAL V6.0
O T I N G
O T I N G
Possible Reason of Abnormality
1.The wiring of the sensor for the expansion
valve D(thin tube) connect loose;
2.The sensor of the expansion valve D（thin
tube）is failure;
3.The sampling circuit is abnormally
1. The wiring of the sensor for the expansion
valve A(thick tube) connect loose;
2.The sensor of the expansion valve A（thick
tube）is failure;
3.The sampling circuit is abnormally
1. The wiring of the sensor for the expansion
valve B(thick tube) connect loose;
2.The sensor of the expansion valve B（thick
tube）is failure;
3. The sampling circuit is abnormally
1. The wiring of the sensor for the expansion
valve B(thick tube) connect loose;
2.The sensor of the expansion valve C
（thick tube）is failure;
3. The sampling circuit is abnormally
1. The wiring of the sensor for the expansion
valve B(thick tube) connect loose;
2.The sensor of the expansion valve D（thick
tube）is failure;
3. The sampling circuit is abnormally
1. Overload in cooling;
2. Overload in heating
1.The refrigerate is not enough for the unit;
2.The expansion valve is failure in heating
mode;
3.The outdoor ambient temperature is too low
in heating mode
1.The wiring of the high/low pressure sensor
connect loose;
2.The wiring of the bypass valve connect
loose;
3. High/low pressure sensor is failure;
4.Bypass coil is failure.
5.Bypass valve is failure.
6.The capillary that connect with bypass
How to Deal With
1. Reconnect the wiring of the sensor
for the expansion valve D(thin tube);
2. Replace the sensor for the
expansion valve D(thin tube);
3. Replace the outdoor control board.
1. Reconnect the wiring of the sensor
for the expansion valve A(thick tube);
2. Replace the sensor for the
expansion valve A(thick tube);
3. Replace the outdoor control board.
1. Reconnect the wiring of the sensor
for the expansion valve B(thick tube);
2. Replace the sensor for the
expansion valve B(thick tube);
3. Replace the outdoor control board.
1. Reconnect the wiring of the sensor
for the expansion valve B(thick tube);
2. Replace the sensor for the
expansion valve C(thick tube);
3. Replace the outdoor control board.
1. Reconnect the wiring of the sensor
for the expansion valve B(thick tube);
2. Replace the sensor for the
expansion valve D(thick tube);
3. Replace the outdoor control board.
1. Overload in cooling;
2. Overload in heating
1.Check the welding point to confirm
whether it exist the leakage point,
and then add some refrigerate;
2. Replace the expansion valve;
3.The unit should operate within
allowable temperature range.
1.Reconnect the wiring of high/low
pressure sensor .
2..Reconnect the wiring of the bypass
valve ;
3.Replace pressure sensor.
4.Replace bypass valve coil.
5.Replace bypass coil.
6.Check whether blockage occur.
REMARKS
FOR
MUTI-SPLIT
outdoor
FOR
MUTI-SPLIT
&inverter
unitary types
FOR
MUTI-SPLIT
outdoor
FOR
MUTI-SPLIT
outdoor
FOR
MUTI-SPLIT
outdoor
VRF outdoor
VRF outdoor
VRF outdoor
99