Friedrich Floating Air Pro Multi-Zone FPHMR42A3A Service Manual page 265

Outdoor Fault Codes
Fault code
18
19
22
23
24
25
26
265
TROUBLESHOOTING
Fault description
AC voltage is abnormal
Suction temperature
sensor fault
The defrosting sensor
fault
Expansion valve A tube
(thin) sensor fault
Expansion valve B (thin)
tube sensor fault
Expansion valve C
(liquid) pipe sensor
fault
Expansion valve D
(liquid) pipe sensor
fault
Possible reasons for
abnormality
1.The AC voltage>275V
or <160V. 2.The AC
voltage of sampling
circuit on the driver
board is abnormal.
"1.The wiring of the
suction tempe- rature
sensor is connected
loosely;
2.The suction
temperature sensor
fails;
3.The sampling circuit is
abnormal."
"1.The wiring of the
defrosting sensor
is connected loosely;
2.The defrosting sensor
fails;
3.The sampling circuit is
abnormal."
"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"
"1. The wiring of
the sensor for the
expansion valve B (thin
tube) connect loose;
2.The sensor for the
expansion valve B(thin
tube) is failure;
3.The sampling circuit is
abnormally"
"1. The wiring of
the sensor for the
expansion valve
C (liquid pipe) is
connected loosely;
2. The sensor of the
expansion valve C
(liquid pipe) fails;
3. The sampling circuit
fails."
"1.The wiring of
the sensor for the
expansion valve
D (liquid pipe) is
connected loosely;
2.The sensor of the
expansion valve D
(liquid pipe) fails;
3.The sampling circuit
fails."
How to deal with Remarks
"1. Normal 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
defrosting 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 outdoor
control board."
"1. Reconnect the wiring
of the sensor for the
expansion valve B(thin
tube);
2.Replace the sensor
for the expansion valve
B(thin tube);
3. Replace the outdoor
control board."
"1. Reconnect the wiring
of the sensor for the
expansion valve C
(liquid pipe).
2. Replace the sensor
for the expansion valve
C (liquid pipe);
3. Replace the outdoor
control board."
"1. Reconnect the wiring
of the sensor for the
expansion valve D
(liquid pipe);
2. Replace the sensor
for the expansion valve
D (liquid pipe);
3. Replace the outdoor
control board."