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Electronic Control Error Code Diagnostics
Error
Code
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02
Extreme low voltage condition exists (<198V
for 230V units and <239V for 265V units).
Shut unit down. Flash error code. When
voltage rises to adequate level normal unit
operation is restored.
• Inadequate power supply
• Defective breaker
• Blown fuse
03
Return air thermistor sensor open or
short circuit
Leave unit running. Alternately flash error
code and set point.
• Defective sensor
04
Indoor coil thermistor sensor open or
short circuit
Leave unit running. Alternately flash
error code and set point.
05
Outdoor coil thermistor sensor open
or short circuit
Leave unit running. Switch to Electric Heat
Mode (Heat Pump only). Alternately flash
error code and set point.
• Defective sensor
06
Outdoor coil Temperature > 175° F for
2 consecutive minutes. (Heat Pump
models only)
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.
• Dirty coil
• Fan motor failure
• Restricted air flow
07
Indoor coil temperature <30° F for 2
consecutive minutes.
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 .
• Dirty filters
• Dirty coil
• Fan motor failure
• Restricted air flow
• Improper refrigerant charge
• Restriction in refrigerant circuit
08
Unit cycles (Heat or Cool demand) >
9 times per hour
Leave unit running. Store error code in
memory.
• Unit oversized
• Low load conditions
09
Unit cycles (Heat or Cool demand) <
3 times per hour
Leave unit running. Store Error Code in
memory.
• Unit undersized
• High load conditions
10 Room Freeze Protection triggered
Leave unit running. Alternately flash error
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11 No Signal to “GL or “GH” terminal Shut unit down. Flash error code.
• Defective remote thermostat
• Defective thermostat wiring
13
High Pressure switch open (24K BTU Only)
Jumper wire loose/missing (9-18K BTU)
Shut unit down. Flash error code.
• Dirty coil
• Fan motor failure
• Restricted air flow
• Non-condensables in refrigeration system
• Non-condensables in refrigeration system
14
Discharge air temperature sensor open or
shorted
Leave unit running. Alternately flash error
code and set point.
• Dip switch # 8 set to "OFF" position
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 button for three seconds while in the error code mode. To
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.