SYMPTOMS What happens is if there is a short internally on the temperature sensor from the +3.5v to ground, this will cause the Controller’s power supply to be pulled down, which in turn will reboot the controller. If left in this condition, it would more then likely cause the Controller to stop working all together […]
ICM Variable Condenser Fan Controller Information
SUMMARY Article provides ICM variable condenser Fan Speed controller installation and setup information SYMPTOMS ICM variable condenser Fan Controller Installation and Operations Manual andThermister Table RELATED DOCUMENTS ICM Installation and Operations Manual Thermister Table
Temperature Sensors – How to Test
SYMPTOMS Incorrect readings can be a result of a defective cable or one that waslengthened improperly. RESOLUTION 1) They are digital. 2) Troubleshooting depends on the symptom. Here are some things to check: Incorrect readings can be a result of a defective cable or one that was lengthened improperly. Look for cable shorts to the […]
Copeland Semi-Hermtic Solid State Module Troubleshooting
SUMMARY Copeland Semi-Hermetic compressor protection Solid State Module. Operation and trouble shooting information SYMPTOMS Copeland Semi-Hermtic compressor will not start CAUSE Possible issue with Copeland Solid State Compressor Motor Protector RESOLUTION Attached article covers operation and troubleshooting information on Copeland Semi-Hermetic motor protectors. APPLIES TO All Legacy PAC and PWC Semi-Hermetic equipped process system chillers […]
Compressor Hot Gas Bypass (HGBP) heating water
SYMPTOMS When microprocessor set point (SP1,SP2) is set below 45F, the chiller runs constant and appears to be heating water rather than cooling. Gylcol freeze protection may have been also added to the system. CAUSE All Legacy Chillers are tested and set up at the time they leave the factory to run water only. This […]
Phase reversal
SYMPTOMS Scroll compressor running but is loud with poor cooling and pumping performance. CAUSE This condition commonly occurs at startup. When the chiller is run tested at the factory, there is a 50% change that your building power will be orientated the same as the factory. If your building is out of phase with the […]
Micro processor – dual stage replacement
SYMPTOMS After performing a chiller microprocessor controller replacement on a dual state “D Series” chiller the second stage programming functions are not showing up in the programming mode. CAUSE By default, legacy replacement microprocessors are shipped configured for single “S Series” stage operation. RESOLUTION When field installing a replacement microprocessor controller on a dual stage […]