Siddons Solarstream MAHRW010ZAB-270, Owner'S Manual

9. RECOGNITION OF ABNORMAL OPERATION

9.2 Continuous Trickle

If you notice a continuous trickle of water from the PTR valve, this is likely due to a build up of grit 
or scale. Lift the lever to release water for a few seconds from the PTR valve. This may dislodge 
small particles of foreign matter to rectify the fault. It is normal for the PTR valve to release a 
small quantity of water during the heating cycle. The amount of discharge will depend on hot 
water usage. As a guide, if it discharges more than 20 litres of water in 24 hours then there may 
be a problem. 

9.4 No Hot Water 

1) Check if the power is switched on.  Check that the isolating switch, to which your Solarstream 
is connected, is switched on.  Check  that the switch marked  

Water Heater

  on your power 

switchboard is turned on. Check that all circuit breakers have been reset. 

If you are connected to Off Peak  or  a  Smart Meter, check that you have power supplied when 
checking the operation of your Solarstream. 

2) Check that the thermal overload (on the digital controller) has not tripped. Turn the power off 
then back on to perform a reset action. 

3) Check whether the Pressure & Temperature Relief valve is discharging too much water. Refer
to Section 4.4

4). Check that you have the correctly size water heater for your requirements. Sizing details are 
available from your Siddons. The rule of thumb is 50 litres per person per day in winter, less in 
summer.

5). Check your household water usage. Is one outlet (such as the bath) using more hot water than 
you think?  Review your  family's  hot water usage and if necessary check the shower flow rates 
with a bucket and measure this. Consider installing low volume shower heads and other measures
 to reduce hot water usage.

9.3 Steady Flow

If you notice a steady  flow of  water from the  PTR  valve, then this may be caused by excessive 
water supply pressure. Note,  a  500kPa  Pressure  Limiting  valve must be fitted.  It may also be 
caused by a faulty Pressure  &  Temperature  Relief (PTR)  valve, or a  faulty  Thermostat / Digital 
Controller. Turn off the electricity supply and contact a qualified technician or Siddons for help.

16

9.1 Start up Delay

NOTE: The heat pump has a 3-minute time delay on restart. If the power to the heat pump is cut
during its heating cycle, then a time delay period will commence upon re-start. The compressor 
and fan will not operate until the completion of this delay period.

SIDDONS

AIR TO WATER HEAT PUMP WATER HEATER

AIR TO WATER HEAT PUMP WATER HEATER