Friedrich FPHW093B - Error Code 16; Error Code 16 Heating Mode; Error Code 21 Cooling Mode; Error Code 11 EEPROM Fault

67 PB
TROUBLESHOOTING
Error Code 16
Error Code 16 Heating Mode
Error Code 21 Cooling Mode
Error Code 11 EEPROM Fault
55
5.
Error code 16 cooling mode
Anti-freeze protection indoor unit
Is indoor heat
exchanger iced up?
Refrigeration system protection,check the
air inlet and outlet of indoor unit
Check the coil
sensor for proper resistance
Correct?
Change the coil
sensor
Change the indoor
board
no
yes
yes
no
Error code 16 heating mode
Overload protection indoor unite
Is indoor heat
exchanger overheating?
Refrigeration system protection,check the air
inlet and outlet of indoor unit
Change the indoor
board
Change the coil sensor
no
yes
yes
no
Error 21 (cooling mode)
Outdoor coil anti-overload protection
Is the outdoor condenser
overheating?
Change the outdoor control board
Refrigeration system protection,check
the air inlet and outlet of outdoor
unit
Change the coil sensor
yes
no
yes
no
Error code11
Outdoor EEPROM in
trouble
Refix the EEprom
Change the EEprom
Check the EEprom
fixing right or not
no
yes
Check the coil
sensor for proper resistance
Correct?
Check the coil
sensor for proper resistance
Correct?