I looked up the users manual for this unit and it said if the display was not working then "ensure the main breaker (located at the power supply panel) and the disconnect switch (located near the heat pump) are both turned ON."
If power is truly comming into the pump then the problem is likely either a bad power supply, connector problem or the display board. There could also be a fuse blown but that would likely be caused by a bad power supply.
I am not sure HeaWave will help but I recommend you call the HeatWave technicalsupport at 800-786-7751 and they might be able to help you figure this issueout. I hope this helps.
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F21 Fault Code Repair LONG DRAIN
If the drain time exceeds 8 minutes the water valves turn off.
NOTES:
After 4 minutes the "Sd" error will be displayed, then 4 minutes later the "F/21" error code will be displayed.
Press PAUSE/CANCEL two times to clear the display.
LONG DRAIN
If the drain time exceeds 8 minutes the water valves turn off.
NOTES:
After 4 minutes the "Sd" error will be displayed, then 4 minutes later the "F/21" error code will be displayed.
Press PAUSE/CANCEL two times to clear the display.
1. Check the drain hose and make sure it is not plugged or kinked.
2. Unplug washer or disconnect power.
3. Check the electrical connections at the pump and make sure the pump is running.
4. Check the drain pump filter for foreign objects.
5. Plug in washer or reconnect power.
6. If the above does not correct the problem, go to step 7.
7. Unplug washer or disconnect power.
8. Replace the pump.
LONG DRAIN
If the drain time exceeds 8 minutes the water valves turn off.
NOTES:
After 4 minutes the "Sd" error will be displayed, then 4 minutes later the "F/21" error code will be displayed.
Press PAUSE/CANCEL two times to clear the display.
1. Check the drain hose and make sure it is not plugged or kinked.
2. Unplug washer or disconnect power.
3. Check the electrical connections at the pump and make sure the pump is running.
4. Check the drain pump filter for foreign objects.
5. Plug in washer or reconnect power.
6. If the above does not correct the problem, go to step 7.
7. Unplug washer or disconnect power.
8. Replace the pump.
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Richcitgo I have same problem with my pool heat pump as you had - How did it get resolved? My Aquacal Heat Pump has electri current getting to it but nothing works, LED not working, nothing on.
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