15
TeST MODe (
The chart below lists the possible error codes and their description:
Error
Code Code Translation Action Taken by Unit Possible Cause
EF “Error Free” - No Codes Stored None Unit Operating Normally
02 An extreme low voltage condition
exists <198V for 230V units and
<239V for 265V units.
Shut down unit. Display Error code and
ash. Once voltage rises to normal level
system power is restored.
• Inadequate power supply
• Defective breaker
• Blown fuse
03 Return air thermistor sensor open or
short circuit
Set return air sensor = 75°F. Alternately
ash set point and error code. Leave unit
running.
• Defective sensor
04 Indoor coil thermistor sensor open or
short circuit
Set ID coil temp = 40°F. Alternately ash
set point and error code. Leave unit running.
• Defective sensor
05 Outdoor coil thermistor sensor open
or short circuit
Set OD coil temp = 20°F. Alternately ash
set point and error code. Automatically
change over to Electric heat Mode only.
Leave unit running.
• Defective sensor
06 If O.D. coil Temperature > 175° F for
2 consecutive minutes. (Heat Pump
models only)
Alternately ash set point and error code.
Shut unit down for 5 minutes, then try again
2 times, if fails the 3rd time then shut down
unit.
• Dirty coil
• Fan motor failure
• Restricted air ow
• Non-condensables in refrigeration system
07 I.D coil temperature <30° F for 2
consecutive minutes.
Alternately ash set point and error
code. Continue fan operation while the
compressor is locked out until the indoor
coil thermistor reaches 45° F, then energize
the compressor. However, compressor
must still wait a lockout time of 180 to 240
seconds.
• Dirty lters
• Dirty coil
• Fan motor failure
• Restricted airow
• Improper refrigerant charge
• Restriction in refrigerant circuit
08 Unit cycles (Heat or Cool demand) >
9 times per hour
Store error code in memory.
Keep unit running
• Unit oversized
• Low load conditions
09 Unit cycles (Heat or Cool demand) <
3 times per hour
Store Error Code in memory.
Keep unit running
• Unit undersized
• High load conditions
10 Room Freeze Protection triggered Alternately ash set point and error code.
Keep unit running.
• Room temperature fell below 40°F
11 No Signal to “GL or “GH” terminal Shut down unit. Display error code and
ash.
• Defective remote thermostat
• Defective thermostat wiring
13
VPAK
24K BTUs
ONLY
High Pressure switch open Turn OFF compressor. Flash error code • Dirty coil
• Fan motor failure
• Restricted air flow
• Non-condensables in refrigeration system