72
TROUBLESHOOTING OUTDOOR UNIT ERROR CODES
ClimateTalk
Fault Code
PCB LED
Display
Transmitted
ClimateTalk Message
Thermostat Fault Probable Causes Corrective Actions
48 E48 NO PUMP DOWN
The control is unable to enter the Pump Down
Mode because indoor heat has been turned on by
thermostat. Please set thermostat to off position.
● Heat provided by secondary heating source
● Turn off heater using thermostat before
operation
49 E49 NO CHARGE MODE
The control is unable to enter Charging Mode
because indoor heat has been turned on by
thermostat. Please set thermostat to off position.
● Heat provided by secondary heating source
● Turn off heater using thermostat before
operation
50 E50 LINE VOLT CTRL
This indicates there is a voltage issue on the
control board. See service manual for
troubleshooting information.
● High or low voltage from supply
● Faulty control board
● Correct low/high line voltage condition; Contact
local utility if needed
● Replace control board if necessary
51 E51 OD COMM ERROR
This indicates potential communication issues have
been detected by the outdoor control board.
● Communication wiring disconnected ● Check communication wiring; Repair as needed
52 - COMP FAIL MINOR
This error indicates the equipment is experiencing
frequent compressor faults. Control has determined
continued operation is acceptable. This indicates
they may be a problem with the equipment.
● Stop valve not completely open
● The compressor wire is lost phase
● Compressor motor failure
● Check the opening of stop valve, should be full
open; Repair/replace if needed
● Check the wire between control board and
compressor
● Inspect compressor motor for proper function;
Replace if necessary
53 - PCB OR FAN MIN
This error indicates the equipment is experiencing
frequent outdoor control board and/or motor faults.
Control has determined continued operation is
acceptable. This indicates they may be a problem
with the equipment.
● Obstruction in fan rotation
● Outdoor fan motor not connected properly
● Outdoor fan not running
● Faulty control board
● Nois e
● Check and clean grille of any debris
● Check wiring from Outdoor fan motor to control
board; Repair if needed
● Check outdoor fan motor & wiring;
Repair/replace if needed
● Replace control board if necessary
54 -
EEV MINOR
This error indicates the equipment is experiencing
frequent low discharge superheat faults.
Control has determined continued operation is
acceptable. This indicates they may be a problem
with the equipment.
● Thermistors inoperable or improperly connected
● Faulty TXV
● Faulty control board
● Check the connection to thermistors;
Repair/replace if needed
● Check the adjustment of TXV; Replace if
needed
● Replace control board if necessary
55 - HI DIS TEMP MIN
This error indicates the equipment is experiencing
frequent high discharge temperature faults. Control
has determined continued operation is acceptable.
This indicates t hey may be a problem with the
equipment.
● Discharge thermistor inoperable or improperly connected
● Discharge thermistor is put on incorrect position or off
● Low refrigerant charge
● Overcharge
● Faulty compressor
● Check discharge thermistor resistance and
connections; Repair/replace as needed
● Check discharge thermistor position
● Check refrigerant charge level; Adjust if needed
● Check refrigerant charge level; Adjust if needed
● Check the compressor; Repair/replace if needed
B0 Eb0 NO ID AIRFLOW
The estimated airflow from indoor subsystem is
near to 0 CFM.
● Failed indoor blower motor
● Indoor fan motor not properly connected
● Too much s tatic pres sure
● Check ID fan motor wiring and connectors;
Repair/replace if needed
● Check ID fan motor; Replace if needed
B9 Eb9 LOW ID AIRFLOW
Estimated airflow from motor is lower than the
airflow requirement.
● Failed indoor blower motor
● Indoor fan motor not properly connected
● Too much s tatic pres sure
● Check ID fan motor wiring and connectors;
Repair/replace if needed
● Check ID fan motor; Replace if needed
D0 Ed0 NO NET DATA
Control board does not have the necessary data for
it to properly perform its functions.
● Air conditioner is wired as part of a communicating
system and integrated control module does not contain
any shared data.
● Replace control board if necessary
D1 Ed1 INVALID DATA
Control board does not the appropriate data needed
to properly perform its functions.
● Air conditioner is wired as part of a communicating
system and integrated control module contains invalid
shared data or network data is invalid for the integrated
control module.
● Replace control board if necessary
D2 Ed2 INVALID SYSTEM
The airflow requirement is greater than the airflow
capability of the indoor subsystem.
● Ai r conditioner/heat pump is wired as part of a
communicating system and outdoor unit requires airflow
greater than indoor unit's airflow capability
● Shared data is incompatible the system or missing
parameters
● Communication wiring has loose connection.
● Verify shared data is correct for your specific
model; Repopulate data if required
● Check communic ation wiring. Repair as
needed.
11 E11 RUN SYS TEST
This test is required at startup. Installer should
navigate to the ComfortNet User Menu, choose Air
Conditioner, then EQUIP TEST and SYSYTEM
TEST. Selecting ON will run the required test.
Display will clear once testing is complete.
● Incomplete SYSTEM TEST
● SYSTEM TEST is running
MESSAGE ONLY
D3 Ed3
There is a mismatch between the shared data
and the control physical hardware.
● Shared sent to integrated control module does not ●
match hardware configuration.
D4 Ed4
The memory card data has been rejected.
● Shared data on memory card has been rejected.
●
● Verify shared data is correct for your specific
model; Repopulate data if required
● Verify shared data is correct for your specific
model; Repopulate data if required
INVALID CONFIG
INVALID MC DATA
Items below are messages only displayed on the thermostat screen.
●
Re-write shared data using memory card
●
Re-write shared data using memory card
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