Ec-Fan Fault Conditions - Vertiv Liebert CW Series Installer And User Manual

CAUTION: Risk of contact with hot surfaces. Can cause injury. The electronics housing,
humidifier components, 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.

EC-fan Fault Conditions

Table 11.1 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)
ElectronicsOver Manual
Temperature (Mains/Software)
Line
Automatic
Under-Voltage
10 Maintenance
Description
One phase ismissing. Inthiscase the motor will come to a stopandthenautomatically restart whenall phasesare
present.
The rotor isblocked. Once the lockingmechanism hasbeenremoved, the motor will automatically restart.
The Hall Effect Sensor isusedto monitor fanspeed. If there isa hall sensor communicationfailure withthe
electronics, the motor will stop. Inthiscase there hasto be a manual restart (either withthe mainspower or
software).
The motor will stopinthe event there isa motor over temperature condition. Inthiscase there hasto be a manual
restart (either withthe mainspower or software).
The motor will stopinthe event there isanelectronicsover temperature condition. Inthiscase there hasto be a
manual restart (either withthe mainspower or software).
Once the line voltage returnswithinpermittedoperatingrange, the fanwill automatically restart.
85