13
electronic Control error Code DiagnosticsError
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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