Friedrich FPHFC36A3B Wi-Fi Service & Parts Manual page 107

Indoor Unit Fault Codes
Fault
Fault D escription
code
12 voltage absent phase
Compressor overheat
13
protector device
the high pressure
switch operate or the
14 unit turn off for high
pressure
protection
the low pressure
switch protection or
15
the unit turn off for low
pressure protection
overload protection in
16
cooling mode
Discharge
17 temperature sensor
fault
AC voltage is
18
abnormal
Suction temperature
19
sensor fault
The defrosting sensor
22
fault
Expansion valve A
23
tube (thin) sensor
fault
107
TROUBLESHOOTING
Possible R eason of Abnormality
Three-phase power is abnormal;
The outdoor wiring connect wrong;
The outdoor control board is
failure.
1. The wiring of the overload
protector connect loose.
2. The overload protector is failure .
3. The refrigerant is not enough;
4. The installation pipe is too long
than normal, but not add the
enough refrigerant;
5. The expansion valve is failure;
6. The outdoor control board is
failure
1. The wiring of the high pressure
protector connect loose;
2. The high pressure protector is
failure;
3.The outdoor control board is
abnormal;
4. Overload in cooling;
5. Overload in heating.
1. The wiring of the low pressure
switch connect loose;
2. The low pressure switch is failure;
3.The refrigerant is not enough;
4.The expansion valve failure in
heating mode;
5.The outdoor control board is
abnormal.
System overload
1.The wiring of the discharge
temperature sensor connect loose;
2.The discharge temperature sensor
is failure;
3.The sampling circuit is abnormal.
2.The AC voltage of sampling circuit
on the driver board is abnormally
1.The wiring of the suction
temperature sensor connect
loose;
2. The suction temperature sensor is
failure;
3. The sampling circuit is abnormally
1.The wiring of the defrosting sensor
connect loose;
2.The defrosting sensor is failure;
3.The sampling circuit is abnormally
1. The wiring of the sensor for the
expansion valve A (thin tube)
connect loose;
2. The sensor for the expansion
A(thin tube) is failure;
3. The sampling circuit is
abnormally
How to D eal With
1. Normally protection
2. Check the wiring connection
refer to the wiring diagram;
3. Replace the outdoor control
board
1. Reconnect the wiring of the
overload protector;
2. Replace the overload
protector;
3. Check the welding point of the
unit to confirm whether it is
leakage, and then recharge
the refrigerant;
4. Add the refrigerant;
5. Replace expansion valve;
6. Replace the outdoor control
board.
1. Reconnect the wiring the high
pressure protector;
2. Replace the high pressure
protector;
3. Replace the outdoor control
board;
4. Please refer to the Note 3;
5. Please refer to the Note 4.
1. Reconnect the wiring of the
low pressure switch;
2. Replace the low pressure
switch;
3.Check the welding point to
confirm whether the unit is
leakage, and then
add some refrigerant;
4. Replace the expansion valve;
5. Replace the outdoor control
board.
Please refer to the Note 3.
1.Reconnect the wiring of the
discharge temperature sensor;
2.Replace the discharge
temperature sensor;
3.Replace the outdoor control
board.
1. Normally protection, please
check the supply power;
2. Replace the driver board.
1.Reconnect the wiring of the
suction temperature sensor;
2.Replace the suction
temperature sensor;
3.Replace the outdoor control
board.
1. Reconnect the wiring of the
defrosting sensor;
2. Replace the def rosting sensor;
3. Replace the outdoor control
board.
1. Reconnect the wiring of the
sensor for the expansion valve
A (thin tube);
2. Replace the sensor for the
expansion valve A (thin tube);
3. Replace the ou tdoor control
board.
R E MAR KS
Application of
three-phase
power supply
models
Applied to
models with
high
pressure
switch or
pressure
sensor
Applied to
models with
low pressure
switch or
pressure
sensor