Pump symbol on controller rotates
but pump does not operate
5.0Fault finding
Is controller to | NO | |
pump connection correct | ||
| ||
and secure |
| |
YES |
| |
Is the pump siezed | YES | |
| ||
NO |
|
Pump fault
Replace pump
Check connections and
rectify as necessary
Can the impeller be
revolved using a screwdriver
after removing the air bleed screw
NO
YES
Free impeller and replace
air bleed screw
Displayed temperatures on controller vary greatly over short time intervals
Are sensor cables | YES | |
laid alongside mains | ||
| ||
voltage cables |
| |
NO |
| |
Have sensor cables | YES | |
been lengthened with | ||
| ||
unshielded cable |
| |
NO |
| |
Do sensors give | NO | |
correct temperature | ||
v |
| |
resistance readings |
| |
YES |
|
Controller fault
Replace controller
Seperate sensor cables from mains cables (Min. 50mm recommended) or use shielded cable
Use shielded cable to extend
sensor cable lengths
Are sensor
connections correctly
made
YES
Sensor fault
Replace sensor
NO
Rectify sensor connections
Potterton Solar - Solar Thermal Domestic Hot Water System | 27 |
