33
T
ROUBLESHOOTING
ClimateTalk
Fault Code
PCB LED
Display
Transmitted ClimateTalk
Message
Thermostat Fault
Probable Causes
Corrective Actions
12
E12
OD CTRL FAIL1
Indicates a general memory error.
●
High electrical noise
●
Faulty control board
●
Replace control board if necessary
13
E13
HI PRESSURE C
(C = CRITICAL)
This error indicates the equipment is
experiencing frequent high pressure
faults.
●
Blocked/restricted condenser coil and/or
lines
●
Stop valve not completely open
●
Overcharge
●
Outdoor fan not running
●
High pressure switch (HPS) inoperable
●
Faulty TXV
●
Faulty control board
●
Check and clean condenser coil and/or lines
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check refrigerant charge level; Adjust if needed
●
Check outdoor fan motor & wiring; Repair/replace if
needed
●
Check TXV; Replace if needed
●
Replace control board if necessary
14
-
HI PRESSURE M
(M = MINOR)
This error indicates the equipment is
experiencing frequent high pressure
faults. Control has determined continued
operation is acceptable. This indicates
they may be a problem with the
equipment.
●
Blocked/restricted condenser coil and/or
lines
●
Stop valve not completely open
●
Overcharge
●
Outdoor fan not running
●
High pressure switch (HPS) inoperable
●
Faulty TXV
●
Faulty control board
●
Check and clean condenser coil and/or lines
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check refrigerant charge level; Adjust if needed
●
Check outdoor fan motor & wiring; Repair/replace if
needed
●
Check TXV; Replace if needed
●
Replace control board if necessary
●
Check high pressure switch; Replace if necessary
15
E15
LOW PRESSURE C
This error indicates the equipment is
experiencing frequent low pressure
faults.
●
Stop valve not completely open
●
Restriction in refrigerant lines
●
Low refrigerant charge
●
Refrigerant leak
●
Low pressure sensor inoperable or not
properly connected
●
Indoor fan motor not functioning correctly
●
Faulty TXV
●
Faulty control board
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check for restrictions in refrigerant line;
Repair/replace if needed
●
Check refrigerant charge level; Adjust if needed
●
Test for system leaks using leak test procedure
●
Check the connection to low pressure sensor;
Repair/replace if needed
●
Check TXV; Replace if needed
●
Check indoor blower motor & wiring; Repair/replace if
needed
●
Replace control board if necessary
16
-
LOW PRESSURE M
This error indicates the equipment is
experiencing frequent low pressure
faults. Control has determined continued
operation is acceptable. This indicates
they may be a problem with the
equipment.
●
Stop valve not completely open
●
Restriction in refrigerant lines
●
Low refrigerant charge
●
Refrigerant leak
●
Low pressure sensor inoperable or not
properly connected
●
Indoor fan motor not functioning correctly
●
Faulty TXV
●
Faulty control board
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check for restrictions in refrigerant line;
Repair/replace if needed
●
Check refrigerant charge level; Adjust if needed
●
Test for system leaks using leak test procedure
●
Check the connection to low pressure sensor;
Repair/replace if needed
●
Check TXV; Replace if needed
●
Check indoor blower motor & wiring; Repair/replace if
needed
●
Replace control board if necessary
17
E17
COMPRESSOR FAIL
This error indicates the equipment is
experiencing frequent compressor faults.
●
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
18
E18
OD CTRL FAIL2
Indicates the control board may need to
be replaced.
●
Outdoor fan motor not connected properly
●
Faulty control board
●
Noise
●
Check wiring from Outdoor fan motor to control board;
Repair if needed.
●
Replace control board if necessary
19
E19
PCB OR FAN FAIL
This error indicates the equipment is
experiencing frequent outdoor control
board and/or motor faults.
●
Obstruction in fan rotation
●
Outdoor fan motor not connected properly
●
Outdoor fan not running
●
Faulty control borad
●
Noise
●
Check and clean grille or 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
20
E20
EEV OPEN CKT
EEV coil is not connected.
●
Outdoor EEV coil is not connected.
●
Faulty outdoor EEV coil.
●
Check outdoor EEV coil connection.
Repair/replace as needed.
21
E21
EEV CTRL FAIL
This error indicates the equipment is
experiencing frequent low discharge
superheat faults.
●
Thermistors inoperable or improperly
connected
●
Faulty TXV
●
Faulty outdoor EEV coil
●
Faulty outdoor EEV
●
Over charge
●
Faulty pressure sensor
●
Faulty control board
●
Check the connection to thermistors; Repair/replace
if needed
●
Check TXV; Replace/repair if needed
●
Check outdoor EEV coil; Repair/replace if needed
●
Check outdoor EEV; Replace/repair if needed
●
Check refrigerant charge level; Adjust if needed
●
Check pressure sensor; Repair/replace if needed
●
Replace control board if necessary
