Daikin DZ17VSA Instructions D'installation page 27

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rouBleShootIng
ClimateTalk PCB LED Transmitted ClimateTalk
Fault Code Display Message
25 E25 Air SEnSor flT
26 E26 PrESSUrE SEnSor
27 E27 coil TEMP fAil1
28 E28 coil TEMP fAil2
29 E29 liQ TEMP fAil
30 E30 oD cTrl fAil3
32 E32 Hi TEMP cTrl1
33 - Hi TEMP cTrl2
34 E34 cUrrEnT SPiKE
35 E35 HiGH cUrrEnT
36 E36 STArTUP Error
37 E37 oD cTrl fAil4
38 E38 coMP VolTAGE
39 E39 oD cTrl fAil5
40 E40 coMP MiSMATcH
41 E41 loW rEfriGErAnT
42 E42 loW linE VolT
Thermostat Fault
The outdoor air temperature sensor • Faulty outdoor thermistor sensor or
is open or shorted. disconnect
The control determines that the
• Pressure sensor inoperable or not prop-
pressure sensor is not reacting
erly connected
properly.
The control has detected that the
• Outdoor defrost thermistor inoperable or
Outdoor Coil Defrost Temperature
not properly connected
Sensor is out of range.
The control has detected that the
• Outdoor coil thermistor inoperable or not
Outdoor Coil Temperature Sensor is
properly connected
out of range.
The control has detected that the
• Liquid thermistor inoperable or not prop-
Liquid Temperature Sensor is out
erly connected
of range.
• Wiring to control board disconnected
Indicates the control board may
• Faulty control board
need to be replaced.
• 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
This error indicates the equipment
between cooling plumbing and cooling
is experiencing high temperature
bracket on control board <3.5 - 5.0 ton
faults on the outdoor control board.
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
This error indicates the equipment
properly fastened <3.5 - 5.0 ton only>
is experiencing high temperature
• No or poor thermal grease coating
faults on the outdoor control board.
between cooling plumbing and cooling
Control has determined continued
bracket on control board <3.5 - 5.0 ton
operation is acceptable. This indi-
only>
cates they may be a problem with
• No flow or limited flow through control
the equipment.
board cooling circuit (potential restriction
in line or low refrigerant) <3.5 - 5.0 ton
only>
• Current spike in supply
Board detected a high current con- • Stop valve not completely open
dition. This indicates the potential • The compressor wire is lost phase
for a short circuit. • Faulty control board
• Faulty compressor
• Short circuit condition
• Stop valve not completely open
Board detected a high current
• Overcharge
condition.
• Faulty control board
• Faulty compressor
• Blocked/restricted heat pump coil and/
The control encountered an abnor- or lines
mal condition during the startup • The compressor wire is lost phase
procedure. • Inconsistent compressor load
• Faulty control board
Indicates the control board may need • Outdoor fan motor not connected properly
to be replaced. • Faulty control board
• High or low voltage from supply
The control has detected a voltage
• The compressor wire is lost phase
related issue with the compressor.
• Faulty control board
• Thermistors inoperable or improperly
Indicates the control board may need
connected
to be replaced.
• Faulty control board
Control determines that its compres-
• Memory card not correct
sor requirement is different than the
• Control board mismatch
compressor capability.
• Refrigerant leak
The control has detected a low • Low refrigerant charge
refrigerant condition. • Thermistors inoperable or not properly
connected
Control detects a low power supply
• Low line voltage supply
voltage condition.
Probable Causes
• Inspect and test sensor; Replace sensor if needed
• Check the connection to pressure sensor; Repair/replace
• Check the connection to OD defrost thermistor; Repair/
• Check the connection to OD coil thermistor; Repair/
• Check the connection to liquid thermistor; Repair/replace
• Check wiring to control board; Repair as needed
• Replace control board if necessary
• Cycle power; re-try during usable ambient temperature
• 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;
• Cycle power; re-try during usable ambient temperature
• 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;
• Check power supply for in-rush current during start-up or
• Check the opening of stop valve, should be full open;
• 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;
• Check refrigerant charge level; Adjust if needed
• Replace control board if necessary
• Check the compressor; Repair/replace if needed.
• Check and clean heat pump 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;
• Replace control board if necessary
• Correct low/high line voltage condition; Contact local utility
• Check the wire between control board and compressor
• Replace control board if necessary
• Check the connection to thermistors; Repair/replace if
• Replace control board if necessary
• Check memory card data vs. heat pump model
• Verify control board size vs. heat pump model; Replace
• Test for system leaks using leak test procedure
• Check refrigerant charge level; Adjust if needed
• Check the connection to thermistor; Repair/replace if
• Check circuit breakers and fuses; Replace if needed
• Verify unit is connected to power supply as specified on
• Correct low line voltage condition; Contact local utility if
27 27
Corrective Actions
if needed
replace if needed
replace if needed
if needed
range
Repair/replace if needed
range
Repair/replace if needed
steady state operation
Repair/replace if needed
Repair/replace if needed
Repair if needed
if needed
needed
control board if necessary
needed
rating plate
needed