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Page 18
IM 796
Table 7: LED Indicator Lights: Normal Operation and Fault Conditions for Heat Pump Unit
t
ON
ON or OFF
Blinking
* Unit has 10 minute delay before it will switch between modes.
Cool
Dry
Fan
Heat
Sleep
Mode or Fault
Action
Cooling
—
Dry
—
Fan
—
Heat
—
Auto mode in heating operation. *
—
Auto mode in cooling operation. *
—
Defrosting outdoor coil.
Heating will resume after coil is
defrosted.
Compressor cycling on overload
Low outdoor air flow,
defective compressor or overload.
Indoor coil sensor loose or defective
Attach or replace.
Outdoor coil sensor loose or defective
Attach or replace.
Room air sensor loose or defective
Attach or replace.
Unit Malfunctions
If in AUTO or SLEEP mode, switch to
Heat, turn SLEEP off, unplug power
cord and plug back in.
If both lights blink with unit in Heat or
Cool and SLEEP off, the problem
may be coil sensor, compressor has
tripped or low refrigerant.