Watlow F4P Series

Watlow Series F4P Operating from the Front Panel ■ 2.7
• Repair heating/cooling circuits.
• Check circuit breakers, switches,
heater elements, compressor.
• Heater/cooling non-functional.
• Replace sensor.• Sensor shorted.
• Replace relay.• Output relay open or shorted.
• Place sensor near source.• Sensor not properly located
• Check all wiring and components.
• Turn the controller off, then on again.
Open Loop Detect
(Upper Display shows error
code for input 1 only. Lower
Display shows additional
errors.
Upper: [oPLP`]
Lower: Open Loop
• Return controller to factory for repair.• Controller has failed.• Flash memory Failed.
Return controller to the
Factory.
• Return controller to factory for repair.• Controller has failed.• RAM Test Failed!
Return controller to the
Factory.
• Turn the controller off, then on again.
If problem persists, power line filter is
required.
• Power line noise has corrupted memory.• Checksum Error!
Parameter memory.
• Checksum Error!
Unit Config memory
• Checksum Error!
Profile memory.
• Normal operation following flash up-
date of firmware.
• Controller firmware has been updated.• Firmware change.
Parameters are initializing.
• Return controller to factory for repair.• Power was interrupted during a flash
update or there is a component failure.
• Flash Memory Failed!
Return controller to the
Factory.
• Return controller to factory for repair.• Component failure.• RAM Test Failed!
Return controller to the
Factory.
• Should not appear in the field. Call
the factory if you get this message.
• Controller powered up for the first time.• First power-up.
Parameters are initializing.
• This is normal upon module change.• Input or output module was changed.• Module change.
All parameters are initializing.
Corrective ActionProbable Cause(s)Indication