33
Solar System Installation Guide
Troubleshooting
PROBLEM
CAUSE
SOLUTION
Pump is not
operating
•
Mains/pump wiring is faulty
•
Build up of limestone around heat
exchanger
•
Breaker tripped
•
The pump control selector is in ‘OFF’
position
•
Collector temperature not high enough
•
High limit tank temp. has been reached
•
Pump rotor damaged
Check wiring at mains /pump
Drain and clean system thoroughly
Re-set breaker
Return controller to automatic mode ‘AUTO’
No action required
No action required
See pump manufacturer’s instructions
No Circulation in
System
•
Pump isolating valves closed
•
Air lock at pressure relief valve
•
Air lock in the system
•
Non-return valve jammed
•
Tank high limit reached and system in
stagnation
•
Air in system
Open valves
Twist cap at pressure relief valve and vent air
Check all pipework rises on return side, falls on
flow side – clear manual vents
Free valve or replace
Wait until system reaches normal operating
conditions
Re-purge the system
Controller is not
operating
•
The controller has no power.
•
The fuse is blown in the controller.
•
The breaker for that circuit blown.
Make certain the breaker is on for that circuit.
Replace the fuse with the identical type called
out in the controller manual.
Reset the breaker for that circuit.
Temperature
Sensor not
reading properly
•
Sensor not plugged into the controller
•
Sensor plugged into incorrect place in the
controller
•
Sensor wire is damaged.
•
Sensor has fallen out of its well
Check that the sensor’s plug is fully inserted in
the controller. See wiring schematics for more
information
Refer to the wiring schematic in this manual for
the proper locations and nomenclature for the
temperature sensors.
Follow the length of the wire and make certain
there are no breaks, or damage to the insulation
on the wire. The controller manual shows a
schematic so a multi meter can be used to check
the wire.
Replace the sensor in the proper well. Refer to
instructions in this manual for where
temperature sensors should be placed.
Low System
Pressure
•
Leak in system
•
Drain / fill valve on pump station not
closed
•
Faulty pressure relief valve
•
Damaged expansion tank causes pressure
fluctuation and relief valve to open
Check all joints
Close fully
Replace
Replace
Performance Loss
•
Broken tubes
•
Damaged insulation
Replace broken tubes
Replace or repair damaged parts
