Maintenance & Troubleshooting
Vertiv | Liebert CRD10 | User Manual 101
• If the motor is too hot, cut off the fan power; after the motor cools down, power on it again for
recovery.
• In the event of a hall failure, factory service is required to fix the issue.
7.12.1
Troubleshooting of the Heating System
Table 7-4 Troubleshooting the Heating System
Items to be Checked or Handling Method
Heating system
does not start, the
contactor does
not close
Check the state of the micro-processing controller, and confirm if there
is a requirement for the heating command
Safety device of
the heating
system is open
Use a multi-meter to measure the resistance on both ends of the
temperature controller; if the resistance is very large, it indicates that the
safety device may be open. Next, check whether the fuse is open and the
temperature controller is damaged. Measure the resistance of the heater
with an ohmmeter to judge if the heater is damaged
The Contactor
closes, but
heating is
ineffective
Check if the heater’s MCB is turned ON; Check whether the voltages are
normal when the contactor is energized
Turn off the power; then physically check the condition of the heater
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