Trane CDQ Installation & Maintenance Manual page 19

Table 2. Troubleshooting energy wheels
Probable Cause
Symptom
Wheel will Motor is not running
not rotate
Excessive friction at the
seals
Drive belt is broken
Wheel main shaft bearing
is seized
Loss of Wheel is not rotating
wheel
Wheel is rotating too
capacity
slowly
Media surface is
contaminated
Wheel may be saturated
with liquid water
CDQ-SVX01A-EN
Troubleshooting
Recommended Action
The fuse or circuit breaker may be blown or open. Check the breaker/fuse box and replace.
There may be a loss of incoming power. Attempt to trace the power loss back to its source
and correct.
The motor may have failed. Check for power at the motor terminals. If present, disconnect
the belt from the motor pulley and see if the motor runs without a load. If it still doesn't
run, replace the motor.
The motor may have failed because it is connected to a variable frequency drive.
Disconnect the VFD and run the motor on 60 Hz power only. Capacitor may be defective.
Replace. Refer to unit name plate for correct value.
Re-adjust the diameter seals per the Seal Adjustment procedure.
Inspect visually. Replace the drive belt.
Replace the seized bearing.
See above
Belt is stretched, slipping. Replace the belt
Seized bearing on the main shaft; replace the bearing.
Excessive friction in seals; adjust.
Clean the media surfaces.
Replace the media if it is severely contaminated and cannot be cleaned. Consider adding a
contaminate filter before (upstream) of the wheel.
Check for moisture carryover from coil or other possible sources such as steam or water
leaks in the unit which may be spraying the wheel with water. Remove source.
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