b)HGV Diagnosis: If Comp is energized and evaporator is not warming, check that
HGV energizes and opens. If not, check for 115VAC at CB C1 (BR) to neutral (W) and CB B1 (P) to neutral (W). If 115VAC is present at CB C1 (BR) to neutral (W) and not at CB B1 (P) to neutral (W), replace CB. If 115VAC is not present at CB C1 (BR) to neutral (W), check wiring connections from BC. If 115VAC is present, check HGV coil continuity. Replace as needed.
c)WV Diagnosis: Confirm LED 3 is on. If not, replace CB. If LED 3 is on, check that water enters the water tank. If not, check that the water supply line shut‑off valve is open and screens or external filters are clear. Check for 115VAC at CB C2 (BR) to neutral (W) and CB A2 (O) to neutral (W). If 115VAC is not present at CB C2 (BR) to neutral (W), check wiring from BC. If 115VAC is present at CB C2 (BR) to neutral (W) and not at CB A2 (O) to neutral (W), replace CB. If 115VAC is present and WV does not energize, check WV coil continuity. If open, replace WV.
d)FM and PM Diagnosis: If FM and PM continue after LED 2 turns off, replace CB.
e)Normal Harvest Cycle Termination Diagnosis: For a thermistor check, see
"II.D. Thermistor Check." If evaporator is warming, thermistor reading is correct, and harvest does not terminate, replace CB.
6)Normal Freeze Cycle – LED 1 is flashing and LED 2 is on. Comp continues. FM and
PM energize. HGV and WV de‑energize. CB monitors the cooling of the evaporator via the thermistor located on the evaporator for freeze termination. When the thermistor drops to 27°F
a)Comp Diagnosis: If Comp
b)FM and PM Diagnosis: If FM and PM do not energize, check for 115VAC at CB
B1 (P) to neutral (W) and CB A1 (DBU) to neutral (W). If 115VAC is present at CB B1 (P) to neutral (W) and not at CB A1 (DBU) to neutral (W), replace CB.
c)HGV and WV Diagnosis: Confirm HGV and WV
d)Normal Freeze Cycle Termination Diagnosis:
27°F
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