Apricus Installation Manual
58
Troubleshooting Guide (continued) :
Problem
Possible
Cause
Suggested Solution
Poor Solar
Heating
Contribution
(Compared to
previous
output at
same time of
year)
Pump
Cycling too
Long and
Dissipating
Heat
●
dTMin value set too low
●
T2 Sensor (Bottom Tank) too low in tank and always reading cold water
– move to correct location
Excessive
Tank Heat
Losses
●
Insulate both the hot and cold water pipes connected to the storage
tank. A check valve (spring not flap) on the cold and hot pipe in close
proximity to the tank will help reduce heat migration up the pipe
●
Insulate and exposed fittings and valves on the storage tank. DO NOT
impair the operation of the PTRV.
Not Enough
Hot Water
Back-Up
Heating
●
Is back-up heating system functioning normally.
Faulty
Temperature
Mixing Valve
●
Check operation of Temperature Mixing Valves
Increased
Hot Water
Demand
●
Has demand in the property for hot water increased
●
May need installation of larger capacity boiler
●
Boost settings on controllers may need revised
●
Larger storage tank / collector array may be required
Intermittent
short bursts
of cold water
when
showering
Faulty
Temperature
Mixing Valve
●
Check operation of Temperature Mixing Valve.
Pump
Running at
Night
Temperature
Sensors not
working
properly
●
Check that sensors are installed correctly :
- Are they wired to the correct terminal blocks in the solar controller
- Ensure wires are secure
●
Check that sensors wires are not damaged
●
Check the Resistance (Ohm) valve of the sensors and confirm with
PT1000 Temperature chart (as a guide 0°C is 1000 Ohm and 100°C is
~1385 Ohm)