Troubleshooting - Aquacal SQ120R Instruction Manual

Titanium Tube-in-Tube Exchanger
1. Disconnect the plumbing to the heat pump at connection unions (removal is counter-
clockwise).
2. Allow water to drain completely from the heat pump. Expect to see a lot of water drain out at
first, and then a small amount to continue to drain out over a long period.
3. Place an air hose into the water inlet of the heat pump; wrap a clean rag
around the hose to form a temporary seal.
4. Push all water from the water circuit using compressed air no stronger than
50 psig (446 kPa). The residual water should be forced out of the heat
pump's water outlet. Allow compressed air to blow into the heat pump inlet
for at least 15-20 seconds after the water stops coming out.
5. Repeat process on the outlet side of the heat pump.
6. Partially reconnect plumbing connection unions.
7. Winterizing is complete.
8. When ready to use the heat pump again, hand-tighten connection unions. Reconnect electrical power, and set the
operating mode on the heat pump. Activate the filter pump.

3 - Troubleshooting

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IN THIS SECTION:
Fault Codes
FLO Indicator
FS Indicator
CEr Indicator
CSE Indicator
dpC or dPO Indicator
pC or pO Indicator
HP Indicator
HP5 Indicator
LP Indicator
LP5 Indicator
OtA Indicator
Issues and resolutions
Display Panel Not Responding
Heat Pump Not Running
Heat Pump's Tripping Breaker
Heat Pump Won't Shut Off
Heat Pump Is Running, Not Heating
Heat Pump Is Running, Not Cooling (Reversing Models)
Ice Forming on the Heat Pump
Water Coming From Heat Pump
Titanium
Tube-in-
Tube
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