If you have a Model 40250-RVC Surge Guard/Transfer Switch and the voltage read out on the remote display does not match the actual supply voltage as measured with a VOM, here is the procedure to calibrate the unit so the voltage is accurate. A friend has a 2012 Monaco Dynasty that has this unit. we were in a park where the voltage was 126VAC. His surge guard was showing 131VAC several times he lost power due to over voltage. 132VAC is the high voltage cut off . We contacted TRC and was provided this procedure. All is good now.
40250-RVC Calibration Procedure
The control board is mounted on the side of the inner wall of the 40250.
The recalibration process for the board in the unit requires stable electrical input of 120V plus or minus 2 to 4 volts. The recalibration would involve the J8 pins to be jumpered or shorted together.
Step 1-Verify stable 120V at input/line side connections on the contactors with volt meter.
Step 2-Remove/Disconnect all power from the RV. Identify the jumper connections next to the monitor lights on the control board. Place suitable jumper or wires on J8 pin 1 and pin 2 on the RVC control board that can be easily remove when power is applied.
Step 3-Verify 120V of power is passing through the input/line side.
Step 4-Carefully remove jumper from J8 pin 1 and pin 2 and power down.
If this can not be done I recommend to replace the unit.
Please let me know if you have any questions.
Regards,
Shawn Weldon
Technical Support Engineer
Technology Research Corp.
Office: 727-535-0572 Ext. 311
Direct: 727-812-0531 TF: 800-780-4324 Ext. 311
Fax: 727-530-7375
Email:
sweldon@trci.net
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