Vertiv Liebert Mini-Mate MT036, Installer/User Manual

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The motor also provides locked rotor protection, undervoltage/phase failure detection and motor current
limitation. These conditions will display an alarm through the Liebert® iCOM.
9.2.3 Fan Assembly Troubleshooting
Any safety hazards stemming from the device must be re-evaluated once it is installed in the end device.
Do not make any modifications, additions or conversions to the fan assembly without the approval of
Vertiv.
WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote
electric power-supply disconnect switches and verify with a voltmeter that power is off before
opening the fan motor electric-connection enclosure. Use only fully-trained and qualified HVAC
technicians to replace or perform maintenance on the EC fans.
WARNING! Risk of contact with high-speed rotating fan blades. Can cause serious injury or
death. Open all local and remote electric power-supply disconnect switches, verify with a
voltmeter that power is off, and verify that all fan blades have stopped rotating before working
in the unit cabinet or on the fan assembly. If control voltage is applied, the fan motor can restart
without warning after a power failure.
CAUTION: Risk of exposure to harmful noise levels. Can cause hearing injury or loss.
Depending on the installation and operating conditions, a sound pressure level greater than
70 dB(A) may arise. Take appropriate technical safety measures. Operating personnel must
wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety
requirements.
CAUTION: Risk of contact with hot surfaces. Can cause injury. The compressor, refrigerant
discharge lines, fan motor, and some electrical components are extremely hot during unit
operation. Allow sufficient time for them to cool to a touch-safe temperature before working
within the unit cabinet. Use extreme caution and wear appropriate, OSHA-approved PPE when
working on or near hot components.
NOTICE
Risk of improper power-supply connection. Can cause equipment damage and loss of warranty
coverage.
Prior to connecting any equipment to a main or alternate power source (for example: back-up
generator systems) for start-up, commissioning, testing, or normal operation, ensure that these
sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be
connected. In general, power-source voltages should be stabilized and regulated to within
±10% of the load nameplate nominal voltage. Also, ensure that no three-phase sources are
single-phased at any time.
NOTE: Do not assume that the fan blades will not start to spin. If the motor is in a fault condition, it will
safely shut down. Once the fault condition is cleared, there are certain conditions in which the motor
will automatically resume operation.
NOTE: Further troubleshooting procedures relating to fan connection/operation in the thermal
management unit are included in Blower troubleshooting .
Vertiv | Liebert® Mini-Mate™ Installer/User Guide
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