Carrier Aquazone 50PCH PCV 007 Installation, Start-Up And Service Instructions Manual page 16

UPM STATUS LED - BLINK CODES
HIGH PRESSURE FAULT
1
2 LOW PRESSURE FAULT
3 CONDENSER FREEZE CONDITION
4 CONDENSATE OVERFLOW FAULT
5 BROWN OUT FAULT
6 EVAPORATOR FREEZE CONDITION
Fig. 16 — Constant Torque Motor, Single Phase, Single Stage, WSHP Open Control