Mikrofill Maxi Plus, Technical Documentation Manual

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5 Alarmconditions
Please note the Maxi is a factory pre-commissioned product, should you require to change any of the preset parameters -
please see " Settings" .
5.1 Low water level alarm
The Maxi continuously monitors the water level in the feed tank. If this falls to below an acceptable level then the unit will
operate a safety shut down. When water level is reinstated the unit will automatically reset.
5.2 Optional system failure/leak alert
5.3 High or low pressure alarms
If, for any reason the system water pressure reaches a high or low condition, as determined by the preset parameters the
LCD will show the alarmmessage, the relevant BMS relay will operate and the Boiler/chiller control relay will shut down the
boiler or chiller. When normal operating pressure is resumed the unit will automatically reset,
5.4 Pump failure
The Maxi can also determine whether a pump has developed a fault. This is achieved by monitoring the systempressure and
if an increase in pressure is not sensed in a set period of time it will stop operation of that pump and the " pump failure"
message will appear on the LCD. If the Maxi Plus is used, it will automatically change to the remaining pump, and a pump
failure message will be displayed.
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The Maxi can differentiate between normal system fill rates and excessive water demand usually due to a severe
system leakage. If this situation occurs the Maxi will shut down, and issue a leak alert warning showing ‘System
Failure’ on the LCD. This alert must be reset manually, by switching off the Maxi and switching back on. If the
leak has been rectified the unit will operate as normal.
In some cases it may be required to disable or enable the leak alert facility.
To disable/enable the leak alert press and hold the service button until the display shows ‘ Service mode’
on the LCD display. Use the system data button to scroll through the settings to leak alert and enable /
disable using the or buttons