Watlow MINICHEF 2000 - Manual (Page 37)

3 6 ■ Wa t l o w M I N I C H E F 2 0 0 0 H a r d w a r e & S o f t w a r e S e t u p G u i d e
Tr o u b l e s h o o t i n g C h a r t
Note: For definitions of errors, see pages 56 - 57.
• Refer to sensor wiring instructions.
• Refer to controller specifications.
• System may need to warm up. • Under-range Error has occurred on
channel 2.
• Controller measures a temperature
below the allowable operating range.
• Temperature sensor lead wires for
channel 2 are improperly terminated
(lead wires are reversed).
• Controller is misapplied.
[Err`11] appears on the
display
• Evaluate condition of channel 2 sen-
sor and circuitry.
• Confirm temperature sensor compati-
bility. Compare controller part num-
ber and specification to the chosen
sensor.
• Refer to the controller part number
on the sticker label, or view the con-
troller part number by accessing the
WatHelp Diagnostics Function.
• For controllers requiring thermocou-
ple sensors, confirm that the
[tc```] parameter is set to the
proper thermocouple curve.
• For controllers requiring RTD sen-
sors, confirm that the [rtd``]
parameter is set to the proper RTD
curve.
• Refer to sensor wiring instructions.
• Refer to controller specifications.
• A/D Overflow Error has occurred on
channel 2.
• Temperature sensor or circuit for
channel 2 is open or damaged.
• Temperature sensor for channel 2 is
incompatible with controller.
• Channel 2 measures a condition
above the controller temperature
range.
[Err10] appears on the
display
• Confirm temperature sensor compati-
bility. Compare controller part num-
ber and specification to the chosen
sensor.
• Refer to the controller part number
on the sticker label, or view the con-
troller part number by accessing the
WatHelp Diagnostics Function.
• For controllers requiring thermocou-
ple sensors, confirm that the
[tc```] parameter is set to the
proper thermocouple curve.
• For controllers requiring RTD sen-
sors, confirm that the [rtd``]
parameter is set to the proper RTD
curve.
• Refer to sensor wiring instructions.
• Refer to controller specifications.
• A/D Underflow Error has occurred
on channel 2.
• Temperature sensor for channel 2 is
incompatible with controller.
• Temperature sensor lead wires for
channel 2 are improperly terminat-
ed (lead wires are reversed).
• Channel 2 measures a condition
below the controller temperature
range.
[Err`9] appears on the
display
Possible Solutions Possible Causes Symptom/Indication