Service and Parts Manual (2019, 2020, 2021, 2022)
Table Of Contents
- INTRODUCTION
- SPECIFICATIONS
- INSTALLATION
- MAINTENANCE
- R-410A SEALED SYSTEM REPAIR
- TROUBLESHOOTING
- Diagnostic Codes
- Outdoor Unit
- Outdoor Unit When The Compressor Is In Operation
- Indoor Unit
- Led Display
- Test the jumper terminals
- Protection Circuit Fault Isolation
- Compressor Fault Isolation
- Electric FIlter Board Fault Isolation
- Electrical Communication Fault ISOLATION
- Unit does not run
- Error Code 39-DC FAN
- Error Code 39-PG Fan
- Error Code 9
- Error Code 13
- Error Code 8
- Error Code 15
- Error Code 16 Cooling Mode
- Error Code 16 Heating Mode
- Error Code 21 Cooling Mode
- Error Code 11 EEPROM Fault
- Error Code 20
- Error Code 33
- Error Code 34
- Error Code 14
- Error Code 1
- Error Code 2
- Error Code 6
- COMPONENTS TESTING
- WIRING DIAGRAMS
- PARTS CATALOG
- Introduction
- 115V Indoor Unit 9-12K
- 230V Indoor Unit 9-12K
- 230V Indoor Unit High Seer 9K
- 230V Indoor Unit High Seer12K
- 230V Indoor Unit 18K
- 230V Indoor Unit 24K
- 230V Indoor Unit 36k
- 115V Outdoor Unit 9K
- 115V Outdoor Unit 12K
- 230V Outdoor Unit 9k
- 230V Outdoor Unit 12k
- 230V Outdoor Unit 18k
- 230V Outdoor Unit 18k
- 230V Outdoor Unit 24k
- Outdoor Unit 36k
- 230v Outdoor Unit 9K HIGH SEER
- 230V Outdoor Unit 12K HIGH SEER
- APPENDIX
- LIMITED WARRANTY
- CUSTOMER SATISFACTION and QUALITY ASSURANCE
- FRIEDRICH AUTHORIZED PARTS DEPOTS
50 PB
TROUBLESHOOTING
Diagnostic Codes
Indoor Unit
Error
Code
Power Timer Running Sleep
1 2 3 4 Content The root cause is may be one of the following
23 1. The wiring of the sensor
for the expansion valve A
(thin tube) connect loose;
2. The sensor for the
expansion A(thin tube) has
failure;
3. The sampling circuit is
abnormal.
24 Outdoor board chip failure. a.Using the wrong drive board;
b.Using the wrong compressor
26 Overheated outdoor
radiator
a. Radiator sensor fails.
b. Detection circuit of the sensor on the
control panel fails.
27 Protection against too high
system pressure
a. The pressure switch fails.
b. The pressure detection switch on the
control panel fails.
c. The measured value of system pressure
exceeds the limit.
33 BLINK OFF OFF ON The failure for temperature
sensor of indoor room
a. The indoor room temperature sensor loose.
b. The indoor room temperature sensor failed.
c. The indoor control board failed.
34 BLINK OFF ON OFF The failure for temperature
sensor of indoor coil
temperature
a. The indoor coil temperature sensor loose.
b. The indoor coil temperature sensor failed.
c. The indoor control board failed.
36 BLINK ON OFF ON Communication failure
between the indoor unit
and outdoor unit
a. the communication cable connector loose.
b. the connection between the lter board
and the terminal is incorrect or loose.
c. the communication cable failed.
d. the connection between the lter board and
the outdoor control board 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.
38 BLINK ON ON ON Indoor EEPROM failure a. The EEPROM chip loose;
b. The indoor control board failed.
39 BLINK OFF ON ON Indoor fan motor runs
abnormally.
a. Something blocking the indoor fan motor.
b. The fan motor cord is disconnected or
loose.
c. The fan motor failed.
d. The indoor control board failed.
41 ON ON BLINK ON The failure for Indoor
grounding protection.
The indoor control board failed.