EasyTouch RV 359 Manual

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©2022 Micro-Air Corp May 20, 2022, revision 1.3
Troubleshooting
The most common problems during installation are mismatching the wires and not seating the
wires in the connector properly. The first step should always be to recheck the instructions and make
sure the wires are seated properly.
The second most common problem is not knowing the thermostat operation. If the system is
running a heating or cooling cycle, the large numbers of the temperature set point will turn red for heating
and blue for cooling. When the large thermostat numbers turn white, the heat pump, heat strip and
furnace should all be off. The fan may continue to run for a while after the cycle completes. If a fan is left
in a manual mode, it will not shut off.
Testing an output
The first step is to check the fuse on the back of
EasyTouch and verify it is still good.
Figure 5 is a table showing the terminal label and
purpose for each of the thermostat wires. This information
can be used in troubleshooting to verify that the thermostat
has turned on an output.
Use a voltmeter to verify that the thermostat has
turned on an EasyTouch output. Set to voltmeter measure DC
voltage and check for ~0 volts between the blue (ground) wire
and the output terminal to be tested to see if the thermostat
has turned on the output. There should be 0 volts present
when the output is on and 12 volts when the output is off.
Further troubleshooting of the component (fan, compressor
furnace, heat pump, heat strip) is required if the voltages are correct but the output is still not operating.
If the thermostat does not have power, test between the R and B wires to determine if there is
12-volt power to the thermostat.
EasyTouch RV Knowledge Bank – More Information
Visit our knowledge bank at http://www.micro-air.com/kb_easytouch_rv.cfm for the latest resources for
setup, operation, and troubleshooting, as well as our main website for contacting us for support
Terminal
label
Function
R
+12VDC
B
-12VDC, Ground
GL
Fan low
GH
Fan high
Y
Compressor
WHP
Heat pump (Valve) or
Heat Strip
W
Furnace
SEN
Not used
SEN
Not used
Figure 5