[Dale]

I have seen this message if I had the unit running and for some reason had to restart it and I did not wait a sufficient amount of time for it to cool.

[Rodger]

Cruise-Air’s need an air conditioner to keep them cool!

I’ve gotten this warning a few times on my units when they’re working too hard. Just re-set and don’t worry about it unless it becomes habitual.

[Rodger]

Had same problem on a friends H He reset as you did finally cleaned evaporator and cleared problem. fwiw

[Archived]

The message is for high compressor discharge pressure. The unit was originaly intended to go on a ship using a water cooled condenser. Since sea water would always be cooler than air you would be unlikely to have a problem unles you had low water flow. When the unit was put on a bus it required an air cooled condenser. Air can easily be 130 degrees entering the condenser creating a high pressure alarm. Thats why a 14,000 btu unit will only produce around 10,000 BTU when the ambient temperature is high.

[Georges]

I hope everyone recognizes how fortunate we are to have expertise such as John Klopp on our forum. He is a skilled engineer in heat transfer and his responses to heating and air conditioning systems are always excellent.

[Georges]

This is the same dreaded message you receive while driving in extreme heat and the cruisairs will shut down due to the hot highway and they usally won’t come back on line until is get cooler.

[Archived]

Thanks all, especially John.

I cleaned all of the filters again, which helped. Then, after an email from Troy that said dust could be part of the problem I sprayed water underneath, aimed at the grate below where the condensers sit. The hope was to dislodge some dust.

It’s 102 toda and very dusty. Those air conditioners are getting a workout!

[Rodger]

I have found that most Cruise Airs are improperly charged and as a result the cooling is not very good.If you know how to charge them properly they will generally improve 3-5 degrees in differential.If you cannot do it go to AAP in Virginia and let Johnny do it,you will be very surprised.

[Mike & Brigitte]

Bonz,

You had 5 duplicate posts, I deleted 4.

[Archived]

Thanks. The site doesn’t like the iPhone on. Good day. Bad Internet service is a killer!

[Don]

Jack….is there a posing somewhere hereabouts on the correct procedure for a Cruise Air Servicing? I don’t see me getting to Johnny at AAP anytime soon,but sure would like to get a good going over on my 3 units

[Archived]

Rodger,

Not to oversimplify, if your temperature difference between supply and return air is 15 degrees or greater and your filters at the evaporator and the coils at the condenser are clean your units are in good shape.

I started a log before I sold our 97 coach in which I recorded the temps for all four Cruise Airs so I could do a better job of predicting if they were continuing to perform or if their output was degrading.

As to having AAP work on the units, while I think that is a great idea if you happen to be near them, it just is not practical in which case a qualified AC technician should be able to do any service work required, and if needed get advice from AAP. They have always been very generous with their phone time.

[Archived]

Crusaire Technical Literature online

[Rodger]

Rodger,I have used the cruise air charts but I have found that they are only somewhat accurate,the way that Johnny told me to charge the cruise airs was to get the suction fitting as cold as possible,I use an IR theromemeter and wedge it into the area pointed at the suction fitting with a rubber band on the trigger and adjust the freon for the lowest temperature and I have found that the cruise air will have 15-20 degrees differential with this method.I am in Lexington Kentucky today and it was 101 here today and my coach hit a high of 72,it really maintained 71 almost all day.

[Archived]

Jack,thanks,I am copying that for an AC guy tomarrow (I hope). Jon- at John Klopps directions I have logged the temp differential as you mention, Dash unit and Galley Unit are right on 15-17 degree differential and no complaint from them.The bedroom unit is the culprit and thank goodness the compressor is in 3rd bay on the Psgr side and I have the shelving out and access to the service points.Now if I can just get him here. We finally got a weather break this afternoon and RAIN so maybe he can break free.I have also downloaded the Cruisair paperwork off the internet so I feel that we are pretty well prepared when/if he shows up. We are scheduled depart Wed AM to go Blue Berry picking in Michigan for the next couple of weeks,so hoping to have it done. If not,I have an old friend in Ohio in the AC business. Thanx all for the input. AAP people are very generous and kindly towards those coming to them for help.