Micro processor - dual stage replacement
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...

Phase reversal
Scroll compressor running but is loud with poor cooling and pumping performance. This condition commonly occurs at startup. When the chiller is run tested at the factory, there is...

Pump mechanical seal leaking
Chiller system or tank re-circulation pump is leaking. The attached PDF provides valuable information on how to confirm if a pumps mechanical seal is leaking.

Pump over amping
System or tank re-circulation pumps starts and run. After operating for a varied amount of time, pumps turn off. Between the main power buss, where power comes into the chiller,...

Receiver valves closed
Chiller compressor starts and runs, then shuts off after a few minutes of running. Microprocessor controller indicates Low-pressure safety trip. Refrigeration suction pressure is...

Tank level switch intermittent trips
On chillers equipped with a tank level indicator the level switch intermittently indicates tank low when the tank is full or near full. Pump cavitation can cause excessive air...

Unlocking the Remote Micro
After installing the Legacy remote display micro-processor unit, user is NOT able to make changes to the system programming. All Legacy remote display micro-processor units are...

Upgrade to new remote micro
How can I upgrade to the new remote micro control panel? In June of 2005, Legacy Chiller Systems released its upgraded microprocessor controller in addition to a new remote...

Variable condenser fan speed control
Chillers equipped with variable condenser fan speed control is tripping on high head pressure (Hi1) fault. Condenser fan(s) are not working properly. ICM condenser variable fan...