Daikin DZ20VC - Page 71

71
TROUBLESHOOTING
OUTDOOR UNIT ERROR CODES
Fault Code
Control Board
LED Display
Transmitted
Climate
Talk Messa
g
e *1
Thermostat Fault Probable Causes Corrective Actions
35 E35 HIGH CURRENT
Control board detected a
high current condition.
• Short circuit condition
• Stop valve not completely open
• Overcharge
• Faulty control board
• Faulty compressor
• Check installation clearances.
• Check the opening of stop valve, should be
full open; Repair/replace if needed
• Check refrigerant charge level; Adjust if
needed
• Replace control board if necessary
• Check the compressor; Repair/replace if
needed.
36 E36 STARTUP ERROR
The control encountered an
abnormal condition during
the startup procedure.
• Blocked/restricted condenser
coil and/or lines
• The compressor wire is lost
phase
• Inconsistent compressor load
• Faulty control board
• Check and clean condenser coil and/or
lines
• Check the wire between control board and
compressor
• Replace control board if necessary
37 E37 OD CTRL FAIL4
Indicates the control board
may need to be replaced.
• Outdoor fan motor not
connected properly
• Faulty control board
• Check wiring from outdoor fan motor to
control board; Repair if needed
• Replace control board if necessary
38 E38 COMP VOLTAGE
The control has detected a
voltage related issue with the
compressor.
• High or low voltage from supply
• The compressor wire is lost
phase
• Faulty control board
• Correct low/high line voltage condition;
Contact local utility if needed
• Check the wire between control board and
compressor
• Replace control board if necessary
39 E39 OD CTRL FAIL5
Indicates the control board
may need to be replaced.
• Thermistors inoperable or
improperly connected
• Faulty control board
• Check the connection to thermistors;
Repair/replace if needed
• Replace control board if necessary
40 E40 COMP MISMATCH
Control determines that its
compressor requirement is
different than the
compressor capability.
• Memory card not correct
• Control board mismatch
• Check memory card data vs. outdoor unit
• Verify control board size vs. outdoor unit;
Replace control board if necessary
41 E41
LOW
REFRIGERANT
The control has detected a
low refrigerant condition.
• Refrigerant leak
• Low refrigerant charge
• Thermisters inoperable or not
properly connected
• Test for system leaks using leak test
procedure
• Check refrigerant charge level; Adjust if
needed
• Checkthe connection to thermistor;
Repair/replace if needed
42 E42 LOW LINE VOLT
Control detects a low power
supply voltage condition.
• Low line voltage supply
• Check circuit breakers and fuses; Replace
if needed
• Verify unit is connected to power supply
as specified on rating plate
• Correct low line voltage condition; Contact
local utility if needed
43 E43 HIGH LINE VOLT
Control detects a high power
supply voltage condition.
• High line voltage supply
• Verify unit is connected to power supply
as specified on rating plate
• Correct high line voltage condition;
Contact local utility if needed
44 E44 OP TEMP RANGE
The control detects the
outdoor temperature outside
recommended operational
range. Unit may continue to
operate normally.
• Ambient air conditions too high
or low
• Cycle power; re-try during usable ambient
temperature range
45 E45 NO COOLING TEST
The control is unable to start
the Cooling mode test
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
running AHRI mode
46 E46 NO HEATING TEST
The control is unable to sart
the Heating mode test
becaue indoor heat has been
turned on by thermostat.
Please set thermostat to off
p
osition.
• Heat provided by secondary
heating source
• Turn off heater using thermostat before
running AHRI mode
47 E47 NO SYS VER TEST
The control is unable to start
the System Verification test
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
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*
2
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
func tion; Replace if necessary
(*2) Network communication error (Refer to "NETWORK TROUBLESHOOTING")
(*1) This message is displayed when using the CTK04 thermostat.