CONNECT SERIES SERVICE MANUAL
45
ENGLISH
Maintenance
How to Replace the Compressor Drive Module
1. First, make sure that power is o. Use a multi meter to measure the voltage between L1, L2, L3, and N. to
be sure the voltage is isolated. Tag the breaker to indicate that the equipment is under repair.
2. Measure the voltage between DC bus P and N on the drive board of the compressor. Set the multimeter
for DC voltage and measure the voltage between P and N as shown below. If the voltage is below 36V,
proceed with the next step.
3. Remove all the wires on the drive board of the compressor.
4. Remove the screws on the drive board of the compressor. The screws are located in the white circles as
shown above in the picture.
5. Replace with a new compressor drive board. Before replacement, apply some silica gel on the IPM module.
6. Install the new compressor drive board. Tighten the screws and connect the wires correctly.
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