Service manual
06/2010
Section 3. Trouble-Shooting the RV500
3.1 Water Leak
Identify the location. If a compression fitting or standard NPT fitting is the source, be sure
the fitting is fully tightened. CAUTION: 1) Use two wrenches so that no force is
transferred to other parts, and 2) over-tightening fitting can damage the unit.
If tightening the compression fitting does not stop the leak, replace the flowmeter and tube
assembly.
If tightening the compression fitting does not stop the leak, replace the flowmeter and tube
assembly.
If there is still a leak from a NPT fitting then remove the fitting and try re-taping using
plumber’s Teflon tape. Otherwise, replace the component. To replace the leaking part, refer
to appropriate location in service manual for change procedure, if necessary.
3.2 Gas Leak
Use leak tester to identify the specific location. Correct leak by either:
Tightening the fitting
Opening the fitting and re-applying thread sealer. The thread sealant must be an AGA-approved
product for use with propane gas (LPG).
Replacing the leaking parts.
CAUTION: When checking for gas leaks DO NOT use flame.
3.3 No Green LED flash or Green LED stays on, but does not
flash
1. Be sure power is ON and panel breaker is not tripped. With power OFF detach the ¼ inch spade
leads of the power supply (see figure 2). Attach a multi meter and turn power ON. If there is no
power then trouble-shoot the coaches electrical system.
2. Be sure all electrical connectors are secure. Check polarity of the 12 vdc supply to the
RV500. The positive (+) lead must be connected to the red (+) lead on the rear of the
RV500. The negative (-) lead must be connected to the black (-) lead.
CAUTION: Supplying the RV500 with reverse polarity will damage the circuit boards.
3. Do you have a converter? If so, the 12 vdc supply to the RV500 must be from the filtered
connection on the converter or connected directly to the battery. Refer to your converter
manual to verify hookup. Also, check the AC content on the 12 vdc supply to the RV500.
Normally, it should be less than 0.3 vac.
4. Open the electrical drawer and check for indications of water or moisture. If you find
moisture turn power OFF and let the drawer dry (a hair dryer may be used if you only use
warm air).
5. Check the power at the circuit board by placing the multimeter probes on the backside of the
2-pin connector (see figure -4). Voltage should be 10.8 – 14.4 vdc. If voltage is lower than
the minimum the ignition board may not function. If voltage is above the maximum it is
possible to damage either circuit board. If there is no voltage at the board then the fuse in
the power supply cable is blown. Change the power supply cable 1331.