Quantum 270-11AC3-134 - Manual (Page 31)

Owner’s Manual Quantum Energy Technologies
Appendix A: TROUBLE SHOOTING GUIDE ON QUANTUM WATER HEATERS
Models covered in this guide :
800 Watt. Compact Air Sourced Domestic Hot Water Heater (0.8kW compressor models)
1100 Watt. Compact Air Sourced Domestic Hot Water Heater (1.1kW compressor models)
1700 Watt
. Titan Split Air Sourced Domestic Hot Water Heater (1.7kW compressor model)
A.1: No Hot Water; Compressor Not Running
Probable Cause Test / Observation Action
1. Power Failure Check power supply, cable & connections. If CB off refer to 2.
2. Circuit breaker (CB) tripped off. Check for short circuit (SC) in line or wiring.
If circuit breaker trips off when compressor re-starts, check
compressor grounding and winding resistance. Remove line or wiring SC.
Replace compressor if found SC.
3. Faulty / incorrect capacitor. Check capacitor operation if compressor will not start. Replace faulty or wrong capacitor.
4. Compressor Seized. Compressor will not start, draws high current, or mechanically
noisy when trying to start. Replace compressor.
5. Thermal cut-out (TCO) on digital
controller tripped off. No power to compressor after thermal cut out (TCO).
If TCO trips off repeatedly, see table “A2”. Reset the TCO by pressing the “SET”
button on the digital controller.
6. Faulty water thermostat. Thermostat did not cut in even though water temperature is
below the restart point.
Electrical disconnection at the thermostat. Check / replace water thermostat or
digital controller.
Reconnect or replace if faulty.
7. Compressor cuts out on current
overload protector. Test for faulty capacitor.
Test for compressor short circuit / compressor seized. Replace faulty capacitor.
Replace compressor if faulty.
Document number: QDC0030PD-11 Page 31 of 40