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Daikin DX17VSS B Series Installation Instructions Manual page 35

Hide thumbs Also See for DX17VSS B Series:
T
roubleshooTing
Thermostat
Control board
display
LED Display
The outdoor air temperature sensor is open
25
E25
or shorted.
The control determines that the pressure
26
E26
sensor is not reacting properly.
The control has detected that the Outdoor
27
E27
Coil Defrost Temperature Sensor is out of
range.
The control has detected that the Outdoor
28
E28
Coil Temperature Sensor is out of range.
The control has detected that the Liquid
29
E29
Temperature Sensor is out of range.
Indicates the control board may need to be
30
E30
replaced.
This error indicates the equipment is
32
E32
experiencing high temperature faults on the
outdoor unit control board.
This error indicates the equipment is
experiencing high temperature faults on
the outdoor unit control board. Control has
33
-
determined continued operation is accept-
able. This indicates they may be a problem
with the equipment.
Control board detected a high current
34
E34
condition. This indicates the potential for a
short circuit.
Control board detected a high current
35
E35
condition.
The control encountered an abnormal condi-
36
E36
tion during the startup procedure.
Indicates the control board may need to be
37
E37
replaced.
The control has detected a voltage related
38
E38
issue with the compressor.
Indicates the control board may need to be
39
E39
replaced.
Control determines that its compressor
40
E40
requirement is different than the compressor
capability.
The control has detected a low refrigerant
41
E41
condition.
Control detects a low power supply voltage
42
E42
condition.
01_EN_DZ17VSA.indd
35
Description
Probable Causes
• Faulty outdoor thermistor sensor or disconnect
• Pressure sensor inoperable or not
properly connected
• Outdoor defrost thermistor inoperable or not
properly connected
• Outdoor coil thermistor inoperable or not properly
connected
• Liquid thermistor inoperable or not properly
connected
• Wiring to control board disconnected
• Faulty control board
• Electrical Noise
• Ambient air conditions too high
• Stop valve not completely open
• Cooling bracket screw(s) missing or not properly
fastened <3.5 - 5.0 ton only>
• No or poor thermal grease coating between cool-
ing plumbing and cooling bracket on control board
<3.5 - 5.0 ton only>
• No flow or limited flow through control board
cooling circuit (potential restriction in line or low
refrigerant) <3.5 - 5.0 ton only>
• Ambient air conditions too high
• Stop valve not completely open
• Cooling bracket screw(s) missing or not properly
fastened <3.5 - 5.0 ton only>
• No or poor thermal grease coating between cool-
ing plumbing and cooling bracket on control board
<3.5 - 5.0 ton only>
• No flow or limited flow through control board
cooling circuit (potential restriction in line or low
refrigerant) <3.5 - 5.0 ton only>
• Current spike in supply
• Stop valve not completely open
• The compressor wire is lost phase
• Faulty control board
• Faulty compressor
• Short circuit condition
• Stop valve not completely open
• Overcharge
• Faulty control board
• Faulty compressor
• Blocked/restricted outdoor unit coil and/or lines
• The compressor wire is lost phase
• Inconsistent compressor load
• Faulty control board
• Outdoor fan motor not connected properly
• Faulty control board
• High or low voltage from supply
• The compressor wire is lost phase
• Faulty control board
• Thermistors inoperable or improperly connected
• Faulty control board
• Memory card not correct
• Control board mismatch
• Refrigerant leak
• Low refrigerant charge
• Thermistors inoperable or not properly connected
• Low line voltage supply
• Inspect and test sensor; Replace sensor if needed
• Check the connection to pressure sensor; Repair/replace if
needed
• Check the connection to OD defrost thermistor; Repair/replace
if needed
• Check the connection to OD coil thermistor; Repair/replace if
needed
• Check the connection to liquid thermistor; Repair/replace if
needed
• Check wiring to control board; Repair as needed
• Replace control board if necessary
• Cycle power; re-try during usable ambient temperature range
• Check grease applying condition <3.5 - 5.0 ton only>
• Check screw tightening condition <3.5 - 5.0 ton only>
• Check for restriction in line
• Check refrigerant charge level; Adjust if needed
• Check the opening of stop valve, should be full open; Repair/
replace if needed
• Cycle power; re-try during usable ambient temperature range
• Check grease applying condition <3.5 - 5.0 ton only>
• Check screw tightening condition <3.5 - 5.0 ton only>
• Check for restriction in line
• Check refrigerant charge level; Adjust if needed
• Check the opening of stop valve, should be full open; Repair/
replace if needed
• Check power supply for in-rush current during start-up or steady
state operation
• Check the opening of stop valve, should be full open; Repair/
replace if needed
• Check the wire between control board and compressor
• Replace control board if necessary
• Check the compressor; Repair/replace if needed
• 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.
• Check and clean outdoor unit coil and/or lines
• Check the wire between control board and compressor
• Replace control board if necessary
• Check wiring from Outdoor fan motor to control board; Repair if
needed
• Replace control board if necessary
• Correct low/high line voltage condition; Contact local utility if
needed
• Check the wire between control board and compressor
• Replace control board if necessary
• Check the connection to thermistors; Repair/replace if needed
• Replace control board if necessary
• Check memory card data vs. outdoor unit model
• Verify control board size vs. outdoor unit model; Replace control
board if necessary
• Test for system leaks using leak test procedure
• Check refrigerant charge level; Adjust if needed
• Check the connection to thermistor; Repair/replace if needed
• 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
35
35
Corrective Actions
2020/11/11
21:29:00
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