Watlow MINICHEF 2000 - Manual (Page 43)

Tr o u b l e s h o o t i n g C h a r t
• Press the HOME key for 2 seconds.
• Or, repeatedly press the ENTER key
to exit and return to the normal
operating mode.
Operator error. Operator cannot get out of
Configuration Mode or
Menu Programming
Mode.
• Refer to Troubleshooting section on
Error Messages.
• Confirm that compatible sensors are
used in the system. Refer to con-
troller specifications.
• Check system wiring.
• Check system sensors.
• Confirm that a maximum of 1
grounded thermocouple is used in
the system.
• Confirm that compatible thermocou-
ple wires/extension wires are used
in the system.
• Verify that the programmed thermo-
couple curve matches the sensor
specification (see [tc```] parame-
ter setting.
• Verify that the programmed RTD
curve matches the sensor specifica-
tion (see [Rtd``] parameter set-
ting)
• Use WatHelp Diagnostics parameter
[tENP1] and [tENP2] to confirm
actual temperatures sensed on
channel 1 and 2.
Malfunctioning temperature sensors.
• [OFSt1] or [OFSt2] parameter
may be set incorrectly.
• System may have two grounded
thermocouple sensors, causing
ground loops.
• Loose or improper connections.
• Reversed sensor lead-wires.
• Sensor not compatible with control.
• Control not programmed properly.
Inaccurate temperatures
Set the [A_Loc] parameter to
[```no].
Application Number Security has
been set.
Software Application
Number cannot be
changed.
Set the [Loc``] parameter to
[```no].
Menu Program Security has been set. Operator cannot reprogram
Menus.
To secure the Application Number, set
the [A_Loc] parameter to
[``YES].
Application Number Security has not
been set.
Software Application
Numbers are being
changed or tampered
with.
To secure the Menu programs, set the
[Loc``] parameter to [``YES].
Menu Program Security has not been
set.
Programmed Menus are
being changed or tam-
pered with.
• Refer to programming guide to reset
the time of day.
• If problem persists, return to factory.
• Real-time Clock is not programmed
properly.
• Battery is low.
Time of day is inaccurate
Possible Solutions Possible Causes Symptom/Indication
4 2 ■ 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