How to Safely Fill a Chiller System Tank
Need to fill a PACT,PWCT,EST tank section on chiller. Procedure outline: To safely fill the PACT/PWCT stainless steel water storage tank.
See attached service bulletin

ICM Variable Condenser Fan Controller Information
ICM variable condenser Fan Controller Installation and Operations Manual and
Thermister Table

Legacy Chiller System Power Problems - chiller shutdowns
Intermittent trips of power monitor or phase monitor causes compressor to shut down and may cause an micro-processor high temperature (HTA) alarm. In some cases, incoming power...

Micro processor - compatibility Information
The attached chart provides detailed compatibility information on Legacy's micro processor controllers. Customers looking to add a remote micro-processor or Chiller Guard...

Micro processor - Dual Compressor Lag Lead
On a dual compressor system CP2 may start on a first stage cooling call. The chillers micro-process controller logs total run hours of each compressor. From a NO call condition,...

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...

Micro Processor J10 Alarm Contacts
Located on the back of the Legacy chiller micro processor controller (top right), there is a J10 terminal designation that is used for remote alarm connections. This block...

Micro-Processor showing 32 and 32
Micro-processor displays 32 and 32 on both top and bottom temperature displays. While in this condition, these temperatures do not change. Possible defective sensor(s). One or...

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...

Remote Micro - Can't turn chiller on and off
Using remote micro processor user can't turn chiller on and off. Remote micro processor is in review mode. Press and hold the PUMP and UP buttons at the same time for 3-5 seconds....

Short on Temperature Sensor
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 inturn...

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...

Temperature Sensors - How to Test
Incorrect readings can be a result of a defective cable or one that was
lengthened improperly.
1) They are digital.
2) Troubleshooting depends on the symptom.

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...

Water Cooled Condenser Design Flow Rate Issues
Water cooled chiller tripping on hi1 (high head) or running higher than normal head pressures. This can be caused by several factors:


1. Low condenser cooling water flo...