Service & Maintenance; Field Replacement Of Capacitors; Troubleshooting - Emerson SolaHD MCR Hardwired Serie Mode D'emploi

MCR Hardwired Series – 50 Hz & 60 Hz
A272-282 Rev. 4 02/2020
7.0 Service & Maintenance
7.1 Service & Maintenance
The unit is a simple, rugged device with no moving parts. Routine service and/or maintenance is not required.
If a problem does occur, please refer to "8.0 Troubleshooting" or contact SolaHD Technical Support for
assistance.

7.2 Field Replacement of Capacitors

Capacitors used in our units are the highest commercial grade, with each one given a rigid acceptance test
upon receipt. SolaHD guarantees free replacement of any capacitors which fail within one year of sale. Older
units can be replaced at a moderate charge.
note: It may be possible to test and identify defective capacitors in the field. Please contact SolaHD Technical
Support at 1.800.377.4384 or 1.847.268.6651 for further assistance.

8.0 troubleshooting

table 24: 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.
Page: 20
Action
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
regulating 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.