Silent Mode

Silent mode is a way to make the reefer unit silent without manual switching it OFF and ON.

The feature is normally used when the reefer unit is located near public areas where the noise from the unit is annoying and not acceptable during ie. the night-time. The feature is selected either ON or OFF and the start time of day and stop time of day is configured all in the control menu, The time setting is controllable in increments of 5 minutes.

The mode is controlled by the wall clock of the controller and the start and stop time. The wall clock might not be set to the local time, so this must be taken in respect during the selection. In case of a period start prior to midnight the start time will be ‘higher’ than the stop time.

When the time is in between start and stop the unit operation will be halted, and the unit will not be operating the compressor, fans and heater. When the period ends normal operation will restart and the unit will operate through out the day until the beginning of the next period.

During the silent mode the unit will show the following:

At the temperature log the flag ‘s’ will be set to indicate the halted operation.

Changing the configuration of the mode is documented in the event log.

Since the unit is not allowed to operate during the silent period, the normal surveillance is not ongoing. The surveillance is re-engaged when the unit restart the operation.