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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
● Noise
● 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
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
● 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 they 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 static pressure
● Check ID fan motor wiring and connectors;
● 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 static pressure
● Check ID fan motor wiring and connectors;
● 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
● Replace control board if necessary
● Re-write shared data using memory card
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
● Replace control board if necessary
● Re-write shared data using memory card
D2 Ed2 SYSTEM MISMATCH
The airflow requirement is greater than the airflow
capability of the indoor subsystem.
● Air 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
● Com
munication wiring has loose connection.
● Verify shared data is correct for your specific model;
Repopulate data if required
● Check communication wiring and power supply wiring
of indoor unit. Repair as needed.
D3 Ed3 INVALID COMFIG
There is a mismatech between the shared data and
the control physical hardware.
● Shared data sent to integrated control module does not
match hardware configuration.
● Verify shared data is correct for your spec
ific model;
Repopulate data if required
D4 Ed4 INVALID MC DATA 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
11 E11 RUN SYS TEST
This test is required at startup. Installer should
navigate to the thermostat menu to run SYSTEM
START-UP TEST.
This code will clear once testing is complete.
● Incomplete SYSTEM START-UP TEST
● SYSTEM START-UP TEST is running
Run the SYSTEM START-UP TEST.
(See the installation manual of the outdoor unit, “STEP3.
SYSTEM START-UP TEST”)
Items below are messages only displayed on the thermostat screen.
● Check combination to be matched with rating list;
Correct if needed.
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