CAUTION: Risk of contact with hot surfaces. Can cause injury.
Use proper skin protection when touching the electronics housing or allow time for the
housing to cool before replacing parts. The electronics housing can get hot and can cause
severe burns.
The fan motors and refrigerant discharge lines are extremely hot during unit operation. Allow
sufficient time for them to cool before working within the unit cabinet. Use extreme caution and
wear protective gloves and arm protection when working on or near fan motors and discharge
lines.
CAUTION: Risk of improper moving, lifting and handling of heavy fan modules. Can cause
equipment damage or injury.
Only properly trained and qualified personnel should work on this equipment. Fan modules for
MCL models weigh in excess of 92lb. (40.8kg) each and fan modules for MCS and MCM models
weigh in excess of 40lb. (18.1kg.) each. Use OSHA-approved lifting techniques, proper body
mechanics and extreme caution to avoid injury and dropping of fans during removal and
installation.
NOTE: If at any time a parameter is entered and the display does not show 888 or if the display shows
Err, re-enter the parameter. If the display still shows Err after ENT is pressed, power cycle the control
board by unplugging P24, waiting 15 seconds and plugging P24 back in. Contact the factory if the
parameter still displays Err after ENT is pressed.
1. Turn Off power to the unit using the disconnect.
2. Use a voltmeter verify that voltage is no longer present at the unit. Wait a minimum of
10minutes to allow the EC fan capacitors to discharge before proceeding.
3. Remove the fan cover, disconnect electrical connections internal to the EC fan and remove the
cable glands from the EC fan to be replaced (see Figure 11.2 on page119 ,Figure 11.3 on
page119 and Figure 11.1 on page118).
4. Remove hardware that attaches the EC fan to the condenser.
5. Use lifting equipment or an adequate number of personnel to remove the EC fan from the
LiebertMC.
NOTE: A spreader bar may be required for the lifting equipment if only one technician is performing the
fan replacement.
6. Install a spreader bar over the new EC fan if only one technician is performing the fan
replacement.
7. Verify that the wire harness on the new EC fan is secured out of the way before lifting the fan.
8. Verify that the lifting cable/chains are not coming into contact with fan blades before lifting
the new fan into place on the condenser.
9. Install the new fan in the Liebert MC and connect the mounting hardware.
10. Verify that the fan blades rotate freely when installed in unit.
11. Install the new cable glands included with the new EC Fan. Torque for the cable glands is:
• 630mm and 710mm fans: 19.5to24.75 in-lb (2.2 to 2.8 Nm)
Vertiv | Liebert® MC™ Installer/User Guide | 112
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