Issue:
What can cause the chiller to trip on bC Overload Trip?
Resolution:
CGWD, CGWE, CCAD, CCAE, CGAD, CGAE Chillers: Cyclone Control
- This diagnostic is displayed when the overload time versus amperage characteristics of the compressor motor have been exceeded.
- Normally this diagnostic is associated with high motor amps or excessive starting currents.
- There are other conditions that will cause this diagnostic that are not obvious to the servicer.
- After approximately six successive trips on the low pressure switch cause by either low refrigerant charge or low ambient conditions this diagnostic can occur.
- If the low pressure switch trips and resets fast enough the UCM logic interprets the successive starting currents as an overload condition.
See CGAD-SB-2B for additional troubleshooting reference.
Notes:
Changes:
Other Question/Problem/Cause Statements:
- bA Overload Trip Compressor A?
- bb Overload Trip Compressor B?
- bC Overload Trip Compressor C?
- bd Overload Trip Compressor D?
Facts:
- CGWD, CGWE
- Air-Cooled Chiller (PBL) (CGAD, CGAE)
- Compressor Chiller (PBL) (CCAD, CCAE)
- Water-Cooled Chiller (PBL) (CGWD, CGWE)
Document Identifier: DOC-92652
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.