101
PB
TROUBLESHOOTING
Error Codes
No. Malfunction Name Error
Code
A/C Status
Possible Causes
7
High indoor coil
temperature (HP)
Indoor coil temperature sensor
detects 136º F or greater for 1
minute consecutive.
Status light will blink 8 times,
pause for 3 seconds, then repeat
Compressor & Outdoor fan shut down. Indoor fan
remains operational. Electric heat is enabled after
15 seconds
When the Indoor coil temperature sensor detects
126ºF for less for two consecutive minutes, the
compressor will return to operation. Dirty Coil or
Fan Failure.
8
High outdoor coil
temperature
Outdoor Coil temperature sensor
detects 149º F or greater for one
minute consecutive
Status light will blink 6 times,
pause 3 seconds, then repeat
Compressor stops. Outdoor & Indoor fans remain
operational.
When the outdoor coil temperature sensor detects
131ºF or less for two consecutive minutes, the
compressor will return to operation.
Check thermistor resistance 20k ohms at 77°F
9
Evaporator Freeze
Protection (Cool
-
ing
Indoor coil temperature sensor
detects 28º F or less for
1 minute consecutive
Status light will blink 5 times,
pause for 3 seconds, then repeat
Compressor & Outdoor fan shut down. Indoor fan
runs continuously.
When the indoor coil temperature sensor detects
40ºF or more for two consecutive minutes, the
compressor & outdoor fan will return to normal
operation. Dirty coil or Fan Failure.
Check thermistor resistance 20k ohms at 77°F
10
Outdoor Coil Frost
Protection (HP)
Outdoor Coil temperature sensor
detects 28º F or less for one min-
ute consecutive
Status light will blink 7 times,
pause for 3 seconds, then repeat
The Compressor & outdoor fan will stop. The
indoor fan will operate normally. If calling for
heat; 15 seconds latter the electric heaters will be
energized. When the sensor detects 40º F or above
for 10 consecutive minutes, the compressor will
be available again to provide heating. Risk of cond.
Fan Damage due to Ice build-up.
Check thermistor resistance 20k ohms at 77°F
