Liebert PX018 Installer's/User's Manual page 65

EC-fan Fault Conditions
Table 9.2 EC-fan Fault Conditions
Fault
Reset Trigger
Condition
Phase Failure Automatic
Locked/Blocked
Automatic
Rotor
Hall Effect Manual
Sensor Error (Mains/Software)
Motor Over Manual
Temperature (Mains/Software)
Electronics
Manual
Over
(Mains/Software)
Temperature
Line
Automatic
Under-Voltage
EC-fan High-voltage Tests
1. Check Fuses. If fuses are okay, perform the following:
2. Check Fuses. If fuses are blown, perform the following:
NOTE: Power wires must be removed from the motor for resistance test.
• Resistances should be similar for all 3 readings.
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Description
One phase is missing. In this case the motor will come to a stop and then automatically restart when all phases
are present.
The rotor is blocked. Once the locking mechanism has been removed, the motor will automatically restart.
The Hall Effect Sensor is used to monitor fan speed. If there is a hall sensor communication failure with the
electronics, the motor will stop. In this case there has to be a manual restart (either with the mains power or
software).
The motor will stop in the event there is a motor over temperature condition. In this case there has to be a
manual restart (either with the mains power or software).
The motor will stop in the event there is an electronics over temperature condition. In this case there has to be
a manual restart (either with the mains power or software).
Once the line voltage returns within permitted operating range, the fan will automatically restart.
• Check all connections.
• Make sure connections are on the wire strand and not on the wire insulation.
• Cycle Power. Disconnect mains voltage to power down the motor and then re-apply
power.
• Check mains voltage at each phase (phase to ground) at the KL1 connector.
Confirm phase failure not present.
• Check that the voltage is within the acceptable voltage range at the KL1
connector. Confirm line under-voltage is not present.
• Check resistances across the phases at the KL1 connector and note them in the
following table..
L1 - L2
L2 - L3
L1 - L3
Ohm
Ohm
Ohm
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