Looking for manual for rv roof air conditioner on our 2004 Challenger 5th wheel. Just says Coleman Mach on the outside of the unit. Model Does have a remote control No optional heating unit

Mach I unit

have to remove cover to access drain lines to clear

That should be a 30,000 Btu unit. Its been a while since I worked on them. The 78 is the series or model, the 30 is the capacity or btu's and the 901 indicates it is a Copeland compressor.

Try airxcel.com, you should get some options, to get either their literature or tech support and they should be able to help you.

Sounds like possible fan capacitor failure. If your not familiar with capacitors, please find someone who is, as they can give a fatal electrical jolt if not handled properly.

Any RV dealer should be able to get you one, if not try inquiring here.
http://www.rvcomfort.com/rvp/contact.php

Check fuse in rv, and thermostat

If all you want to do is re-route condensation dripping off the roof, and it's a rubber roof, one easy way is to buy a caulking tube of "Dicor" self leveling sealant for rubber roofs from RV dealer, and run a 1/4"-3/8" bead across roof from AC to wherever you want it to go, and let it cure for a couple of hours. Nobody sees it, and a tube is about $10 max.

COLEMAN R.V. PRODUCTS
GO TO rvcomfort.com
Click on RVP (RV PRODUCTS)
Click on type of AC, if you can’t find the information you want there,
then click on contact us on the Green Bar.
You can get Service Support or Email address and Phone numbers

sounds like the unit is low on freon. it will need to be serviced so the leak can be fixed then recharged.