Application Guide

4
Note: If the system is in cooling and is programmed to have only a heating appliance connected in a zone,
then the thermostat will still display the room temperature in that zone, but the user will not be able
to operate any cooling appliance in that zone since there is not one connected in that zone. Your
homeowner packet should contain literature that will list what heating and cooling appliances are
installed in each zone of your motor home.
Error Codes:
No. Item Condition Deal with Displayed Error
Code
1
Room temperature
sensor is bad.
Detecting the temperature
is lower than -30 ℃ or larger
than 80 ℃ for 1 mins.
Compressor &
Furnace will not
run
Service Required.
Code: A1
2
Indoor coil
temperature sensor
is bad
Detecting the temperature
is lower than -30 ℃ or
larger than 80 ℃ for 1
mins.
Service Required.
Code: A2
3 Lack of refrigeration
In cool mode after the
compressor is running
more than 10 mins, the
indoor coil temperature is
more than 20 ℃ for 1
min.
Service Required.
Code: A3
4 Lack of heat pump
In heat mode after the
compressor is running
more than 10 mins, the
indoor coil temperature is
less than 10℃ for 1 min.
Service Required.
Code: A4
5 Compressor is bad.
After compressor running
1mins, the current of
compressor is zero. And
the different between
indoor coil temp. and
room temp. is less than
3℃.
Service Required.
Code: A5
6 Fan is bad
After fan running 1mins,
the current of fan is zero.
Service Required.
Code: A6