Daikin DX20VC - Page 67

TROUBLESHOOTING
67
ClimateTalk
Fault Code
Control Board
LED Display
Transmitted Climate
Talk Message *1
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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 completel
y open
• Overcharge
• Outdoor fan not running
• High pressure switch (HPS) inoperable
• Faulty indoor EEV or TXV
• Faulty indoor EEV coil
• Faulty control board
• DV**PEC air handler is connected with an
incompatible model
• 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 indoor EEV or TXV; Replace if needed
• Check indoor
EEV coil; Replace if needed.
• Replace control board if necessary
• Replace indoor unit with TXV applicable indoor
unit
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) i
noperable
• Faulty indoor EEV or TXV
• Faulty indoor EEV coil
• Faulty control board
• DV**PEC air handler is connected with an
incompatible model
• 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 indoor EEV or TXV; Replace if needed
• Check indoor EEV coil; Replace if needed.
• Replace control board if necessary
• Check high
pressure switch; Replace if
necessary
• Replace indoor unit with TXV applicable indoor
unit
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 indoor EEV or TXV
• Faulty indoor EEV coil
• Faulty control board
• DV**PEC air h
andler is connected with an
incompatible model
• 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 indoor EEV or TXV; Replace if needed
• Check indoor EEV coil; Replace if needed
• Check indoor blower motor & wiring;
Repair/replace i
f needed
• Replace control board if necessary
• Replace indoor unit with TXV applicable indoor
unit
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 indoor EEV or TXV
• Faulty indoor EEV coil
• Faulty control board
• DV**PEC air handler is connected with an
incompatible model
• 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 indoor EEV or TX
V; Replace if needed
• Check indoor EEV coil; Replace if needed
• Check indoor blower motor & wiring;
Repair/replace if needed
• Replace control board if necessary
• Replace indoor unit with TXV applicable indoor
unit
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 t
he 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.
• Obs
truction 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
21 E21 EEV CTRL FAIL
This error indicates the equipment is
experiencing frequent low discharge
superheat faults.
• Thermistors inoperable or improperly
connected
• Faulty ind
oor EEV coil
• Faulty indoor EEV or TXV
• Faulty outdoor EEV coil
• Faulty outdoor EEV
• Overcharge
• Faulty pressure sensor
• Faulty control board
• DV**PEC air handler is connected with an
incompatible model
• Check the connection to thermistors;
Repair/replace if needed
• Check indoor EEV coil; Repair/replace if needed
• Check indoor EEV or TXV; Repair/replace if
needed
• Check outdoor EEV coil; Repair/replace if
needed
• Check outdoor EEV; Repair/replace if needed
• Check refrigerant charge level; Adjust if needed
• Check pressure sensor; Repair/replace if
needed
• Replace control board if necessary
• Replace indoor unit with TXV applicable indoor
unit
(*1) This message is displayed when using the CTK04 thermostat.
OUTDOOR UNIT ERROR CODES