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electronic Control error Code Diagnostics
Error
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Code
E
F
E
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Extreme low voltage condition exists (<198V
02
for 230V units and <239V for 265V units).
Return air thermistor sensor open or
03
short circuit
Indoor coil thermistor sensor open or
04
short circuit
Outdoor coil thermistor sensor open
05
or short circuit
Outdoor coil Temperature > 175° F for
06
2 consecutive minutes. (Heat Pump
models only)
Indoor coil temperature <30° F for 2
07
consecutive minutes.
Unit cycles (Heat or Cool demand) >
08
9 times per hour
Unit cycles (Heat or Cool demand) <
09
3 times per hour
10
Room Freeze Protection triggered
11
No Signal to "GL or "GH" terminal
High Pressure switch open (24K BTU Only)
13
Jumper wire loose/missing (9-18K BTU)
Discharge air temperature sensor open or
14
shorted
Diagnostics
The Electronic control continuously monitors the VPAK unit operation and will store service codes if certain
conditions are witnessed. In some cases the unit may take action and shut the unit off until conditions are corrected.
To access the error code menu press the 'Heat' and 'High Fan' buttons simultaneously for three seconds. If
error codes are present they will be displayed. If multiple codes exist you can toggle between messages using the
temp up
button. To clear all codes press the temp down
exit without changing codes press the 'Low Fan' button.
Test Mode
For service and diagnostic use only, the built-in timers and delays on the VPAK may be bypassed by pressing the 'Cool' and
'Low Fan' buttons simultaneously for three seconds while in any mode to enter the test mode. CE will be displayed when en-
tering test mode, and oE will be displayed when exiting. The test mode will automatically be exited 30 minutes after entering it
or by pressing the 'Cool' and 'Low Fan' buttons simultaneously for three seconds.
Note: To access the Test Mode while under remote wall thermostat operation, remove thermostat's wires at the
terminal block on the electronic control board then connect a jumper wire between GL and GH.
A
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Shut unit down. Flash error code.
voltage rises to adequate level normal unit
operation is restored.
Leave unit running. Alternately flash error
code and set point.
Leave unit running. Alternately flash
error code and set point.
Leave unit running. Switch to Electric Heat
Mode (Heat Pump only). Alternately flash
error code and set point.
Shut unit down for 5 minutes, Alternately
flash error code and set point, then try again
2 times, if unit fails the 3rd time then shut
unit down and alternately flash error code
and set point.
Shut down Compressor, and continue fan
operation. Alternately flash error code and
set point until the indoor coil thermistor
reaches 45° F. Then, (after lockout time of
180 to 240 seconds expires), re-energize
the compressor .
Leave unit running. Store error code in
memory.
Leave unit running. Store Error Code in
memory.
Leave unit running. Alternately flash error
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Shut unit down. Flash error code.
Shut unit down. Flash error code.
Leave unit running. Alternately flash error
code and set point.
button for three seconds while in the error code mode. To
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When
• Inadequate power supply
• Defective breaker
• Blown fuse
• Defective sensor
• Defective sensor
• Dirty coil
• Fan motor failure
• Restricted air flow
• Non-condensables in refrigeration system
• Dirty filters
• Dirty coil
• Fan motor failure
• Restricted air flow
• Improper refrigerant charge
• Restriction in refrigerant circuit
• Unit oversized
• Low load conditions
• Unit undersized
• High load conditions
•
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• Defective remote thermostat
• Defective thermostat wiring
• Dirty coil
• Fan motor failure
• Restricted air flow
• Non-condensables in refrigeration system
• Dip switch # 8 set to "OFF" position
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Troubleshooting
