Roof AC shuts off with engine running
Hi folks, Here's one that has been puzzling me for a while, and today I decided to trace down the cause -without much luck, but I'm getting closer. I have a 2002 Bounder, with two roof AC units. If I...
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depends on the units and thermostats involved
BUT it might be control voltage to the relays in the A/C unit
with the engine on an generator running the converter and alternator combined
the charging voltage might be giving a control error
when you turn on the second a/c the control voltage drops just enough too allow the #1 to reset
you can test this by turning off the circuit breaker going to the converter
while running the engine
with the 2 a/c off, the first should stay on, IF it was too high control voltage
of course i like the easy work around, of letting the blower run on the 2nd a/c
BUT it might be control voltage to the relays in the A/C unit
with the engine on an generator running the converter and alternator combined
the charging voltage might be giving a control error
when you turn on the second a/c the control voltage drops just enough too allow the #1 to reset
you can test this by turning off the circuit breaker going to the converter
while running the engine
with the 2 a/c off, the first should stay on, IF it was too high control voltage
of course i like the easy work around, of letting the blower run on the 2nd a/c
