TR1 VFD Series 2800
CGAM-080F Aircooled Chiller
Problem: 2 CGAM chillers with 2 VSD 1A36,1A37 per chiller. Fans never spin and VSD go out on error 12 Current Limit parameter 221 and error 9 inverter overload trip.
Para 105: Motor Current - 3.2 amp
Para 221: Current Limit (ILIM) - 100%
Para 224: Warning High Current(IHIGH) - 4.2 amps
Test points: VSD starts and immediately throws out error 12 and eventually goes into error 9. Fan never spins. Highest amps reading is 4.2a. Highest Hz is 3.
I am thinking this is a locked rotor scenario but since both chillers are brand new and all 4 VSD (2 per chiller) run the same error, I am thinking this is a parameter issues(factory setting or installation set).
After contemplation I have come to the conclusion that I may have either a high brake cut-out hertz (para 138) or low start voltage (para 133) I was no longer on site when I thought of these(hence I may have remembered these numbers wrong) but I think Para 138 was set to 2.2 Hz and Para 133 was set to 20v. If my start voltage is to low my fan wont turn and act like a LRA and if my brake cut out is to high it acts like a LRA.
Anyone else have an idea?