Sterlco Micro Series Water Temperature Control Unit - Manual (Page 37)

MICRO Series Water Temperature Control Units Page 37
drip cover on top of the motor, you’ll have access to the end of the shaft. It has
been slotted to make it easy to turn with a screwdriver. If the shaft is free to turn,
next check that the motor overloads are set, check for blown fuses, and finally
check the power supply on each leg to the motor. A qualified electrician should
check the motor and its circuit.
Important!
If the pump motor wiring is disconnected for removal from the unit,
make sure that you check the actual rotation direction
when the motor is rewired to the unit.
A phase sensor does not always indicate proper rotation
if motor wire leads are reversed at installation.
Consult the elementary wiring diagram for more information.
Heaters
Heaters may need to be cleaned chemically or mechanically to remove deposits
and dirt that reduce heat transfer and cause hot spots. Hot spots cause premature
heater failure. Install a new gasket when reassembling. Make sure a qualified
electrician disconnects and reconnects heater wires.
Solenoid Valves
; Clean annually, more often if using high mineral content water or on high
service level units.
; Sluggish operation, excessive leakage, and/or noise indicate cleaning is
necessary. Inspect the components for excessive wear while the valve is
disassembled.
; Rebuild kits are available from the manufacturer’s Parts Department.
6-3 Restoring the Controller to Factory Setup
If the preset parameters on the controller have been tampered with and it no
longer properly controls temperature, you can restore the controller to factory
setup parameters.
6-4 Electrical Connections
Make sure that a qualified electrician inspects all electrical components and
connections every six (6) months for secure attachment and ground connections.
Inspect all wiring for fraying or damage, especially power lines where they enter
the unit. All wiring connections must be tight.