Airxcel 46101-8114, Service Manual

Page: 9 / 19

9. ELECTRICAL DIAGNOSTIC FLOW CHARTS
BACKWALL AIR CONDITIONER
With the use of these flow charts, you will be able to
quickly identify a non-working problem. Determine if the
problem is high or low voltage, and then solve the
problem.
IMPORTANT NOTICE
When using a jumper wire to diagnose a
low voltage problem, Never Short Any
Positive Terminal to Ground, or the
Terminal Marked “B”. Serious thermostat
or P.C. Board damage may occur.
To use these flow charts, start at the top left corner.
Check what is indicated in that box. If the answer to what
is indicated is NO, work horizontally until you find the
problem. When the answer is YES or OK, work the chart
downward until you locate the problem. Do Not Move
Downward on any chart until all preceding steps have
been confirmed good. Do Not start in the middle of any
chart without knowing everything previous (upward on
the chart) is OK, or you may replace the wrong part.
To prevent the possibility of severe personal injury, death, or equipment
damage due to electrical shock, always be sure the power supply to the
appliance is disconnected before doing any work on the appliance. This
can normally be accomplished by switching the breaker for the air
conditioner to OFF, disconnecting all external electrical connections and
cords, switching on-board electrical generators and INVERTOR to OFF,
and removing the cable from each positive terminal on all storage and
starting batteries.
SOME DIAGNOSTIC TESTING MAY BE DONE ON
ENERGIZED CIRCUITS. ELECTRICAL SHOCK CAN
OCCUR IF NOT TESTED PROPERLY. TESTING TO BE
DONE BY QUALIFIED TECHICIANS ONLY.
-9-
! WARNING – SHOCK
HAZARD
DANGER