Friedrich FPHSW09A1B Service Manual

43 PB
TROUBLESHOOTING
Diagnostic Codes
Outdoor Unit
When the unit has the following trouble and the compressor stops running, The LED of outdoor control board will show the
error sequence automatically:
Diag
Code
Outdoor Failure Description LED1 LED2 LED3 the root cause my be one of the following
Mark description: the lights ash every second for the following faults
Outdoor coil temperature sensor
faulted
ON OFF ON a.the outdoor coil sensor connector loose.
b.the outdoor coil temperature sensor failed.
c.the outdoor control board failed.
Compressor exhaust temperature
sensor faulted
ON OFF OFF a.the compressor exhaust temperature sensor
connector loose.
b.the compressor exhaust temperature sensor
failed.
c.the outdoor control board failed.
Communication failure between the
indoor unit and outdoor unit
OFF OFF BLINKS a . t h e co m m u n i c a t i o n c a b l e co n n e c t o r lo o s e .
b.the communication cable failed.
c.the connectorion between the lter board and the
outdoor control board is incorrect or loose.
d.the connectorion between the lter board and
the terminal is incorrect or loose.
e.the indoor control board failed.
f.the PFC board failed.
g.the power board failed.
h.the outdoor control board failed.
Current overload protection ON BLINKS OFF a.the fan motor run abnormally.
b.the condensor and evaporator is dir ty.
c.the air inlet and outlet is abnormall.
Maximum current protection ON BLINKS ON a.the outdoor control board is short circuited.
b.the drive board is short circuited.
c.the other components are short circuited.
Communication trouble between
outdoor unit and driver
OFF ON ON a. the connection wires are loose.
b.the outdoor board or drive board failed.
Outdoor EEPROM faulted ON ON ON a.the EEPROM chip is loose.
b.the EEPROM chip inserted in wrong direction.
c. The EEPROM chip failed.
Compressor exhaust temperature
too high protection
OFF BLINKS ON a.the compressor exhaust temperature sensor
failed.
b.the refrigerant of the unit is low.
Outdoor ambient temperature
sensor faulted
ON ON OFF a.the outdoor ambient temperature sensor
connecter loose.
b.the outdoor ambient temperature sensor
failed.
c.the outdoor control board failed.
Compressor shell temperature too
high protection
OFF ON BLINKS a.the compressor exhaust temperature sensor
connector loose.
b.the refrigerant of the unit is low.
Anti-freeze protection with cooling
or overload protection with heating in
indoor unit
OFF BLINKS BLINKS a.the indoor coil temperature sensor connector
loose.
b.the indoor coil temperature sensor failed.
c.the indoor control board failed.
d. the refrigerant system is abnormal.

Friedrich FPHSW09A1B Specifications

General

Brand	Friedrich
Model	FPHSW09A1B
Category	Air Conditioner
Language	English