Drive Operation Failure - Error code: E-04
Criteria:
- The compressor failed to start after five tries with 15-second intervals between each try. This could be caused by either loss of phase in drive output current to the compressor, compressor motor locked rotor situation, or damaged drive hardware. The Diode test should yield a reading of 0.3-0.7v when the drive hardware is not damaged. When Diode testing, the meters negative lead should be placed on DC+ while the positive lead will test on the U, V, and W terminals. The leads will then swap when testing DC-
Troubleshooting:
- Verify there are no loose connection in input power wiring to the drive and output wiring from the electric drive to the compressor. Check compressor windings for any ground faults.
- Check if LED 602 is flashing On or completely Off. If Off, then inverter module is defective and needs to be replaced.
- Cut off power to the drive and disconnect the output power (U, V, W) from the inverter module. By using the Diode settings on the multimeter, check the following 6 pairs of diodes: (DC+, U), (DC+, V), (DC+, W), (U, DC-), (W, DC-). Perform a continuity check between the following pairs of terminals: (U, V), (V, W), (U, W). If any of the above pairs are shorted, then Integrated Power Module "IPM" is defective, and inverter module needs to be replaced.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.