Thermo King Precedent C-600M, Operator'S Manual

Page: 80 / 166

Operating Instructions
78
Zone Level Shutdown Alarms
A zone Shutd2own Alarm will force the affected zone to
shutdown, but allow the unit to continue to run as required by
the host unit or other zones. A small alarm icon will appear
next to the affected zone and blink with a period of ½ second
on - ½ second off. If zone Shutdown Alarms occur in all zones
then the unit will shut down and Alarm Code 114 Multiple
Alarms - Can Not Run will be set.
Pretrip Alarms
If an alarm occurs during a Pretrip Test the alarm code will be
displayed as Pretrip Alarm XX, where XX is the alarm code.
Alarm Codes When Switching Between
Diesel and Electric
If a shutdown alarm occurs that affects only diesel mode
operation and the unit is switched to electric, the diesel mode
shutdown alarm becomes an electric mode log alarm. This
allows the unit to run in electric mode without clearing the
shutdown alarm that is preventing diesel mode operation. If the
unit is switched back to diesel mode, the alarm again become a
diesel mode shutdown alarm and prevents unit operation.
In the same manner, if a shutdown alarm occurs that affects
only electric mode operation and the unit is switched to diesel,
the electric mode shutdown alarm becomes a diesel mode log
alarm to allow diesel mode operation. If the unit is switched
back to electric mode, the alarm reverts to an electric mode
shutdown alarm and prevents unit operation. If the unit is
configured for electric to diesel autoswitch, it automatically
starts and runs in diesel mode if an electric shutdown occurs.
Clearing Alarm Codes
Most alarm codes can be cleared conventionally from the
Alarm Menu using the CLEAR Key.
The following control and display sensor alarm codes can only
be cleared from the Maintenance Menu or Guarded Access
Menu:
• Alarm Code 03 Check Control Return Air Sensor
• Alarm Code 04 Check Control Discharge Air Sensor
• Alarm Code 203 Check Display Return Air Sensor
• Alarm Code 204 Check Display Discharge Air Sensor