TROUBLESHOOTING
46
ClimateTalk
Fault Code
PCB LED
Display
Transmitted ClimateTalk
Message
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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
(*1) This message is displayed when using the CTK04 thermostat
