Magnum MTT25 / MTT25CAN — Fine Voltage Adjustment
Adjustments · Voltage regulator / MDC
For the Magnum MTT25 / MTT25CAN, from the Magnum operator's manual.
Applies to: Magnum MTT25, Magnum MTT25CAN, Isuzu 4LE1NYGV-01 / 4LE1NYGV-03E engine, Isuzu 4LE1NYGV-03G / 4LE1NYGV-03E engine
Before you start
- If the voltage is increased or decreased too fast or too slow, the unit will automatically shut down.
Procedure
- Upon startup the Running screen displays 'V Detect' and counts down from 45 seconds to zero.
- The controller records the generator nominal output voltage and compares it to the voltage selector switch set point.
- If the recorded nominal voltage differs from the selector switch set point by 10% or more, the controller shuts the generator down.
- Adjust output voltage with the fine voltage adjustment screw (rheostat) below the Control Power switch within the 45 second delay.
- Check 'L1N' or 'L12' voltage on the Generator screen and turn the screw until it matches the selector switch rating within 10%.
Tools required
- Flat head screwdriver Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- V Detect delay 45 seconds
- Generator output must be within +/- 10% of selector switch rating
Source: Magnum operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.