Future Design MCT-CM, User Manual

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MCT-CM
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Alarms). By activating the product load timer, the alarm will be reset and the alarm start delay will become
active. Once the start delay expires, if the alarm condition is present, the alarm delay will become active and
once expired, the redundancy alarm will be activated.
NOTE: If the product load timer (alarm inhibit) is already active, pressing the Load Timer button will cause
the MCT to prompt the user if they wish to reset the timer. This allows the user to reset the start delay
each time the button is pressed should more time be required to clear the condition that will cause
the redundancy alarm to occur.
The
Reset button is used to reset a redundancy system failure; system 1 fail, system 2 fail, system 1/2 fail and
reset alternating redundancy upon a redundancy alarm. Normal system switching will only resume once the
alarm condition has been reset and cleared on the Alarm screen and the ‘Reset’ button is pressed.
The concurrent
Minimum Time is shown when redundancy is configured for concurrent operation. This entry
defines the minimum amount of time that the back-up system will operate when a redundancy alarm occurs.
This field can be set from 0 to 32767 minutes.
The ‘Alternate’ button is provided when redundancy is configured to switch after defrost. It provides access to
the Alternate settings screen.
The
Alternating (HH.MM) fields are used to set the time of day (24 hour clock) at which the equal run time
interval will begin. If it is 8AM for example, and the time of day is set for 12:00, the equal run time interval will
begin at noon.
NOTE: If redundancy was operating in manual mode, and not placed into auto until 12:01, the equal run time
interval would not begin until the following day at noon. Redundancy must be in auto mode when the
time of day elapses for the interval timer to begin. Each time redundancy is placed in manual mode,
or redundancy is inactive due to the system being turned off, the interval timer will be reset and will
not begin again until redundancy is active in auto mode and the time of day is reached.
The alternating switch
Interval defines the equal run time duration for each system when redundancy is
operating in auto mode. Once the interval timer is activated according to the time of day entry, the primary
system will alternate back and forth according to the minutes of operation defined by this field. Valid entry is in
the range of 0-32767 minutes. If a value of 0 is entered, the alternating timer will not operate. The interval
must have a value of 1-32767 in order for alternate switching to take place.