Gmr-32b Phase Controller Manual !exclusive! -

Ensure the main power is disconnected before performing wiring. Verify phase sequence using a separate tester before powering the GMR-32B.

| Interval | Action | |----------|--------| | Monthly | Visual check: LEDs, fan noise, burnt smell. | | Quarterly | Clean dust from heatsink and fan using compressed air. Torque power terminals to spec (often 1.2 Nm). | | Annually | Measure SCR voltage drop across each phase (<1.5V @ rated current). Verify calibration of input-to-output transfer function. | | Every 5 years | Replace internal cooling fan. Electrolytic capacitors on control board should be tested. | gmr-32b phase controller manual