Watlow MINICHEF 2000 - Manual (Page 35)

Tr o u b l e s h o o t i n g C h a r t
3 4 ■ 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
M
INI
C
HEF ™
2000 Troubleshooting Chart
Errors (Messages 1-14 alternate on display with normal display.)*
*Note: For definitions of errors, see pages 56 - 57.
• Confirm temperature sensor com-
patibility. Compare controller part
number and specification to the cho-
sen 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 1.
• Temperature sensor for channel 1
is incompatible with controller.
• Temperature sensor lead wires for
channel 1 are improperly terminat-
ed (lead wires are reversed).
• Channel 1 measures a condition
below the controller temperature
range.
[Err`5] appears on the
display
• Return controller to factory. • Calibration Error.
Controller is out of calibration. [Err`4] appears on the
display
• Cycle the power to the controller: off-
on. If [Err`3] reappears on the
display, return controller to factory.
• Controller RAM memory malfunc-
tion.
[Err`3] appears on the
display
• Cycle the power to the controller: off-
on. If [Err`2] reappears on the
display, return controller to factory.
• Controller EEPROM component
malfunction (checksum error).
[Err`2] appears on the
display
• Cycle the power to the controller: off-
on. If [Err`1] reappears on the
display, return controller to factory.
• Controller EPROM component mal-
function (checksum error).
[Err`1] appears on the
display
• Check the controller mating connec-
tors and system harness assemblies
for proper installation.
• Cycle the power to the controller:
off-on.
• Check power supply, fuses, switches,
breakers, connectors, wiring for
proper connection.
• System power switch is off.
• System fuse is blown.
• System circuit breaker is tripped.
• System high-limit device is latched.
• System wiring has open circuitry.
• Power supplied to controller does
not meet specification.
Main display is blank.
No indicator lights.
Possible Solutions Possible Causes Symptom/Indication