SYMPTOMS How can I upgrade to the new remote micro control panel? RESOLUTION In June of 2005, Legacy Chiller Systems released its upgraded microprocessor controller in addition to a new remote microprocessor based controller. The new remote controller makes it possible to perform many of the chiller control functions from up to 500 feet away. […]
Pump over amping
SYMPTOMS System or tank re-circulation pumps starts and run. After operating for a varied amount of time, pumps turn off. CAUSE Between the main power buss, where power comes into the chiller, and the pump motor there will typically be several places in the electrical circuit where power can be interrupted. These are: Wires, fuses, […]
Chiller Problems – Water Heating Up
SUMMARY This article describes why your chiller may be heating up water instead of chilling it. When the chiller loop is set to run below 45F, you must adjust glycol concentration. 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 […]
Chiller System Microprocessor Error Codes
SUMMARY This article introduces the new error codes for chiller systems’ microprocessors. SYMPTOMS Effective 1-1-2006 an update was performed on the Legacy microprocessor controller that provides diagnostic information should a temperature or pressure sensor fail. Error codes are as follows: “tSi” for the inlet temperature sensor error. “tSo” for the outlet temperature sensor error. “tL1” […]
Chiller Phase Reversal – Poor Cooling and Pumping performance
SUMMARY This article describes how to repair a chiller system that is currently having cooling or pumping problems. SYMPTOMS Scroll compressor running but is loud with poor cooling and pumping performance. CAUSE At startup: This condition commonly occurs at startup. When the chiller is run tested at the factory, there is a 50% chance that […]
Chiller System Problems – Excessive Noise
SUMMARY This article provides the information of how to fix a chiller system when it is producing excessive noise on startup. The most common cause of this problem is the compressor’s internal scroll running backwards. SYMPTOMS Compressor making excessive noise at startup. CAUSE Three phase scroll compressor running backwards. RESOLUTION Condition normally occurs at initial […]
Glycol – Adding to chiller loop
SUMMARY This article describes the steps that should be taken to add glycol to a chiller system. The article addresses some important things that must be considered in this process. SYMPTOMS There are many applications where a chillers process loop has the possibility of freezing by way of (direct or indirect) contact with cold ambient […]