Issue:
Low pressure cutout
Resolution:
Verify EEPROM change was done per CG-SVB08A-EN to help with nuisance LPC trips.
Below are related items that should be checked if the EEPROM change has been done.
- Check whether there is glycol in the chilled water loop. If so, the LPC switches may need to be changed with lower pressure switches.
- Verify head pressure control setup values are set at default. Delaying the initiating of the fans (lowering the lower limit) by 5F may help.
-Verify the GPM through the evaporator is above the minimum flow.
-Verify the chilled water loop is at least a 3 minute loop but should be closer to a 5 minute loop as far as volume of water in the loop is concerned.
Notes:
Changes:
Other Question/Problem/Cause Statements:
- DIAGNOSTIC: Low pressure cutout
- Is there an eprom upgrade for the CGAF?
- Is there a fan staging eprom upgrade ?
Facts:
- Brazed Plate and Frame Heat Exchanger
- Air-Cooled Chiller - Intellipak (CGAF)
Document Identifier: DOC-83366
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.