Troubleshooting | 31SM Split CS Series Heat Pump
8733827905 (2021/11)SM Split CS Series Heat Pump
Subject to change without prior notice
UPM LED Status Indicator (Blink Code)
Information
The LED status indicator is found on the UPM
board. See Fig. 6 on page #16.
Table 15 UPM LED Status Indications
Compressor Ohms
Table 16 Compressor Ohms
Indication
Color
Blinks Description
GREEN Solid 18–30 VAC power is present
RED 1 High-pressure lockout
RED 2 Low-pressure lockout
RED 3 Freeze sensor lockout
RED 4 Condensate overflow
RED 5 Brownout
RED 6 Evaporator Freeze condition
Model Start Winding Run Winding
SM024 1.64 1.30
SM036 1.52 0.88
SM048 1.86 0.52
SM060 1.63 0.39
Tolerance +/- 7%. All resistance values must be
measured with compressor at room temperature.
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