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Vertiv I Liebert LPC I User Manual
excessive heat temperature protection switch, humidifier protection switch, discharge
air temperature sensor, and low pressure sensor. If any connection is poor or faulty,
replace the components or their connectors depending on the damage. Specifically,
check the connection parts such as high pressure switches and solenoid valves on
priority.
• Check the electrical components for any fault or damage. Inspect the circuit breakers
and fuses as well as the control boards. If any defect is found, then immediately replace
those components.
• Inspect the specifications and ageing of the control cable and power cable between the
indoor unit and the condenser. If any defect or damage is observed, replace the cables.
• Opt for high precision humidity and temperature measuring meters to calibrate the
humidity and temperature sensors to ascertain maximum accuracy in the readings.
• Adjust the set points. Check the functionality of the parts and auto-flush control logic
of the water pan of the infrared humidifier.
• Simulate and check the operation flow of the protector devices such as high and low
pressure alarms, high and low temperature alarms, high level water alarms, and
overheating protection to mention a few.
• Check the water detection sensor and their functionality. The sensor must be placed
away from any water pool or drainage trench on the floor (approximately 2.5 meters
away from the unit).
• Before fastening the connections of any mechanical parts or cables, ensure
that the power supply of the control unit has been disconnected.
• Do not use the water detection sensor to detect any flammable liquid.
Keep the sensor away from any flammable liquids.
5.5
Filter maintenance
The filter in the unit has an efficiency of 30% and is in compliance with the US ASHRAE52-76
and Eurovent 4/5 standards. The dust resistance value of the filter is 90% (EU4 standard).
The controller is configured to provide a filter service alarm to ensure the feasible operation
of the filter. The default fan running time is set to 2000 hours. When the time is exceeded, the
filter service alarm is triggered. The filter needs to be changed if there is clogging or damage.
As per the requirement, the filter must be inspected every month and needs to be replaced if
it is faulty or clogged.
• Ensure that the unit is powered off while replacing the filter.
• After the filter is replaced, the fan speed reading must be cleared and set to 0.
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