Thermo King UT-1200, Manual

Page: 63 / 169

Operating Instructions for Premium HMI Control Panel
63
Alarms
Alarm Types
Alarms may be one of four types as shown.
Log Alarms
Log Alarms are indicated for 60 seconds each
time the unit is turned on. This level of alarm
serves as a notice to take corrective action before
the condition impacts unit performance.
Maintenance items such as maintenance
hourmeter time-outs are log alarms.
When the unit is turned on the display will show
the Thermo King Logo and then the “Configuring
System” message. If log alarm(s) are present the
Log Alarm notice will appear on the display for
60 seconds as shown. The amber K symbol of the
remote indicator alarm light (if installed) will also
be on during this period. The Standard Display
will appear and the remote indicator alarm light
will go to the white T symbol after 60 seconds.
NOTE: The Alarm Icon does not appear on
startup with log alarms present.
Figure 91: Log Alarm Notice
NOTE: If required, an engine start may occur
while the display in Figure 91 is shown. This is
normal operation.
Check Alarms
Check Alarms are indicated by an Alarm Icon in
the display. The amber K symbol of the remote
indicator alarm light (if installed) will be on. This
level of alarm serves as a notice to take corrective
action before a problem becomes severe. The unit
will run with check alarms but some features and
functions may be inhibited.
Shutdown Alarms
Shutdown alarms will be set if continued
operation could cause damage to the unit or the
load. Shutdown Alarms are indicated by the
following:
• The Alarm Icon will appear in the display.
• The display and backlight will flash on and
off.
• The display will switch from normal video to
reverse video and back to normal video.
(Light areas become dark and dark areas
become light.)
• The remote indicator alarm light (if installed)
will display only a row of LEDs at the bottom.
Shutdown alarms will force the unit into
shutdown to prevent potential damage to the unit
or load. The unit will remain in shutdown until the
shutdown alarm is manually cleared. Exceptions
are some engine and electric shutdown alarms that
become log alarms when switched to the alternate
operating mode (diesel to electric or electric to
diesel).
Prevent Alarms
Prevent Alarms are also indicated by a steady
Alarm Icon in the display. The remote indicator
alarm light (if installed) will be on. The unit will
attempt to resolve the situation as shown below.
• The unit will be temporarily shut down if a
Prevent Alarm is active.
• The unit will remain shut down for a timed
restart interval or until the fault conditions are
corrected.
• If the unit is in a temporary shutdown, Alarm
Code 84 Restart Null will be present along
with the associated Prevent Alarm.
• The unit will restart and run (in most cases
with forced reduced performance) to
determine if continued operation is possible.
The unit will run in this manner for a timed
interval. If the unit is running with forced
reduced performance, Alarm Code 85 Forced
Unit Operation will also be present under
some conditions.