ISSUE:
How to manually test a Danfoss TR1 Drive
RESOLUTION:
Make sure to use proper Personal Protection Equipment (PPE) when handling live powered equipment
TOOLS REQUIRED: Digital Multimeter and amp meter (clamp)
Follow these steps:
- Turn off chiller power
- Remove motor lead from the drive
- Reconnect power to the chiller
- On the drive press "Quick Menu" and "+" sign simultaneously
-
Verify the drive has the correct parameter settings
- Go to parameter "PAR 002" and change from 0 to 1 (manual operation)
- Go to parameter "PAR 003" and set to 30 HZ
- Press "Quick Menu" and go to "FR" screen
- Press "Start" on the drive
-
Measure drive output voltages phase-to-phase and phase-to-ground.
Example: For a 460v unit at 30 Hz the voltages phase-to-phase should all be 265v
- If the voltages are equal, then the drive is "good"
- Stop the drive and set "PAR 002" back to 0 and "PAR 003" also back to 0
To test the motor:
- Reconnect the motor leads removed from Step #2 above and continue with the rest of the procedure. On Step #7, set the value to 60 Hz and be sure to check current on all 3 legs of motor and compare current draw with the nameplate data
A drive which is operating normally will provide balanced output voltage phase-to-phase and phase-to-ground
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.