Troubleshooting - Sola HD MCR Portable Série Mode D'emploi

Table 2: Troubleshooting
Problem
Nominal voltage too high
Nominal voltage too low
Unit does not regulate closely
Output voltage is very low (20–60 V)
No output voltage
Transformer operating temperature
Unit is operating, but does not appear to
have the correct output
Support
Please contact SolaHD Technical Support at 1.800.377.4384/1.847.268.6651 or by e-mail at solahd.technicalservices@emerson.com for further
assistance.
8 | MCR PORTABLE SERIES USER MAnUAL

8.0 Troubleshooting

1. The load may be considerably less than the full rating. See "6.2 Load Regulation".
2. The load may have a leading power factor.
1. The load power factor may be lagging.
2. The unit may be slightly overloaded. See "6.8 Current Limitations".
1. The unit may be slightly overloaded. See "6.8 Current Limitations".
2. The actual line voltage swings may be outside the rate range of the unit, particularly on the low
side.
3. On varying loads, a certain amount of load regulation may be mixed with the line voltage regu-
lating action. See "6.2 Load Regulation".
1. Unsuspected or unplanned overloads of substantial size may occur intermittently (motor-
starting currents, solenoid inrush currents, etc.). See "6.8 Current Limitations".
2. One or more capacitors in the regulator may be defective.
1. Check power source breakers or fuses.
2. Check input switch.
3. Check continuity between input terminals, and also between output terminals.
1. The transformer used in the unit is designed to operate at high flux density and relatively high
temperatures. After connection to the line for 30 minutes or so, the transformer core structure
may be too hot to touch with your bare hands. This is normal and should not cause concern.
The steps below will usually establish whether the apparent poor performance is due to a fault in
the unit or to some peculiarity of the working load.
1. Disconnect the working load.
2. Connect a dummy load of lamps, heaters, or other resistive loads (substantially equal to the
full load rating of the regulator) directly across the output terminals.
3. Measure the output voltage of the regulator (using a true RMS type voltmeter) directly across
the output terminals.
Action