AEC Econo-Cool Chillers - Manual (Page 47)

Page 46 AEC Water Temperature Control Units
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 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.
E5CK Operating Parameters
The E5CK controller has several mode selections. Within each mode are numerous
parameters that can be set.
Before you can gain access to the several modes of operating parameters, you must
change the security lock-out of the controller. AEC sets the security level at the factory
to protect the parameters from being accidentally changed. The explanation that begins
on the following page is how to change operating modes, how to change out the
security level, and how to reset factory default settings.