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Trouble Shooting
Trouble
1. Controller does not come
on.
2. Circulator does not start or
run in "on" position.
3. Circulators will not run
with switch in "auto".
4. Circulator runs constantly
in "auto".
5. Inadequate solar loop
temperature.
6. System losing temperature
at night.
30
Probable Cause
A. Controller is not plugged in
B. Breaker tripped to off
C. Blown fuse in controller
D. Inoperative controller
A. Shaft bound
B. Blown fuse or breaker
C. Bad electrical connection
D. Inoperative controller
A. Same as A through D
indicated above
B. Inoperative sensor circuits
C. Poorly attached or insulated
sensors
D. Inadequate temperature
differential
A. Inoperative sensors or
sensor wire circuits
B. Inoperative controller
A. Recent heavy usage of hot
water
C. Inoperative circulator
D. Collector shading
E. Ambient conditions
F. Steam lock at solar collector
A. Inoperative check valve(s)
B. Inoperative controller
C. Inoperative sensor
circuits
Remedy
A. Check to see if plug is in outlet
B. Reset breaker
C. Replace fuse
D Replace controller
A. Remove plug at rear of circulators and
insert screw driver into slotted end of
shaft; turn to loosen shaft
B. Replace fuse; or reset breaker
C. Tighten connections
D Replace controller
A. Same as A through D indicated above
B. Check sensor circuits and wiring
C. Reattach or reinsulate
D. System will not operate until preset
conditions are met
A. Check sensor circuits and wiring,
check for short in collector sensor
circuit or open in tank sensor circuit
Replace sensor wire or sensors
B. Replace controller
A. Wait until system temperature is
replenished
C. Remove plug at rear of circulator
and insert screwdriver into slotted end
of shaft, turn to loosen shaft
D. Remove shading obstacles
E. Wait until preset conditions are met
F. Recharge solar closed loop to remove
air from antifreeze solution
A. Make sure check valves in Regusol
are not stuck open
B. Replace controller
C. Check sensor circuits and wiring
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