Water Supply Quality - Sanden GAUS-315EQTD Installation Manual

High ambient temperature defrost
E048
drive error
E070 Fan motor locked
E071 Fan motor revolution error
E073 Water circulation pump locked
E090
～
System control error
E150
Notes:
1. After a component is replaced or the inspection is completed, turn the unit on/off several
times for a minimum of 60 seconds at a time to confirm the error does not re occur.
2. If the corrective actions above do not solve the error problem, a malfunction of the PCB is
most likely.
Water Supply Quality (Supplemental)
Chloride and PH
In areas with a high concentration of chloride in the water, that water can cause corrosion
and subsequent failures. Where the chloride level exceeds 9 ounces per 66 gallons (250
mg/litre), the warranty is no longer valid on to the heat pump unit and tank unit.
PH is a measure of whether the water is alkaline or acid. In an acidic water supply, the
water can attack the parts and cause them to fail.
No warranty coverage is given on the heat pump unit and tank unit where the PH is less
than 6.0.
Supply Water with a PH less than 6.0 may be treated to raise the PH.
Sanden Heat Pump – Installation Manual
Page 24 of 33
- Check if the pipes are frozen
- Ensure mains water supply is available
- Ensure all shut off valves are open
- If the water circulation pump is not
working, replace the pump
- Remove foreign objects from the
evaporator coil (e.g. fallen leaves, grass,
snow)
- Replace the ambient temperature
thermistor
- Replace the defrost thermistor
- Reconnect the connector, check if it is
off the PCB
- Replace the fan motor
- Check the heat pump piping for
blockage or kinking
- Confirm that the connector for the
water circulation pump is connected to
the PCB correctly
- Replace the water circulation pump
Replace the PCB