Question about Parallax Power Supply Parallax 7100 Series 55 Amp REPLACEMENT Electronic Power Center
Posted by Anonymous on
The Parallax 7155 converter should not require battery support for any 12 volt load amperage that is less than the maximum amperage capacity of the converter. A standard RV incandescent 12 volt lamp draws about 1.5 amperes for each bulb. With the battery disconnected and other 12 volt loads off, turn on lamps (not fixtures) and calculate the number of bulbs which can be turned on. If you run out of lamps, turn on vent fans etc. The idea here is to try to get to 55 amperes of DC load if possible without going over 55 amperes. At a sustained DC load of about 25-30 amperes or higher, the fans should cycle on continuously after about 5 -10 minutes. Lamp brightness should be normal and the measured voltage from the converter should be above 13 volts if under 55 amps of DC load. If the voltage drops with only a few lamps on, a converter issue would be likely.
Diagnostic tests an RV technician should make would be to:
1. Disconnect the battery system.
2. With the converter system powered on, measure the DC amperage with a DC ammeter capable of reading at least 60 amperes DC from the blue lead at the DC fuse panel terminal VCC.
3. Measure the DC voltage at terminal VCC and DC ground.
4. Record both readings.
At any DC load amperage less than 55 amps, the voltage should be above 13.0-13.2 volts DC. This method should take out all guesswork and confirm a DC converter section issue or not.
Posted on Oct 14, 2014
Tips for a great answer:
Sep 16, 2016 | Health & Beauty
Oct 18, 2014 | UPG 12V 12Ah Electra Scoot-N-Go 88615...
Jul 08, 2014 | Peg Perego 12 Volt Rechargeable Battery
Jul 27, 2011 | Invacare Pronto M51 Power Wheelchair
Apr 18, 2011 | Yamaha YZF Thunder ace 1000 R Motorcycles
May 20, 2010 | Jet 3 Ultra Power Chair
Apr 06, 2010 | 2000 Ford Focus
Jun 22, 2009 | Ryobi Multi-Volt Battery Charger
Mar 10, 2009 | Golden Technologies Compass Electric...
1,441 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: