32
Model 59126.502, 630025 First, turn the 20 amp air condi-
tioner breaker to OFF. Next, remove the wires from the
switch. With the switch in the OFF position, you should not
have continuity between Terminal L1 and any other white
numbered terminal. See FIG. C4.
In the first HIGH FAN position you should have
continuity between Terminal L1 and Terminal 1 only.
In the second HIGH FAN position, you should have
continuity between Terminal L1 and Terminal 2 only.
In the LOW FAN position you should have continuity
between Terminal L1 and Terminal 4 only.
In the first HIGH COOLING position you should have
continuity between Terminal L1 and Terminal H; and
Terminal L1 and Terminal 1 only.
In the second HIGH COOLING position, you should
have continuity between Terminal L1 and H; and Ter-
minal L1 and Terminal 2 only.
In the LOW COOLING position, you should have con-
tinuity between Terminal L1 and Terminal H; and Ter-
minal L1 and Terminal 4 only.
In the first HIGH HEATING position, you should have
continuity between Terminal L1 and Terminal C; and
Terminal L1 and Terminal 1 only.
In the second HIGH HEATING position, you should
have continuity between Terminal L1 and Terminal C;
and Terminal L1 and Terminal 2 only.
In the LOW HEATING position, you should have conti-
nuity between Terminal L1 and Terminal C; and Termi-
nal L1 and Terminal 4 only.
Be sure to check the switch in all positions and be sure you
have continuity only on the terminals for the selected posi-
tion. Lack of continuity or continuity on incorrect terminals
designates a defective switch, and it must be replaced.
Section C - Components, cont’d.
FIG. C14
C10. Changeover Thermostat
The changeover thermostat is a capillary tube/bellows-type
switch. Its function is to allow the compressor to operate
only when outside ambient is 40° F. or warmer. See FIG.
C15.
To check the changeover thermostat, first verify the air tem-
perature at the capillary tube. If the temperatures are above
45°F., continuity should be between terminals 2 to 3 and
no continuity between terminals 2 to 1. For temperatures
below 40°F. , continuity should be between terminals 2 to 1
and no continuity between terminals 2 to 3.
Note:
A defective changeover thermostat can keep the
compressor from operating in the COOL or HEAT PUMP
modes.
FIG. C15
C11. Remote Sensor
The remote sensor is used with the Comfort Control Sys-
tem to monitor and control the temperature in the different
zones. Normally, a remote sensor is used for each unit or
zone. A remote sensor is optional for Zone 1, or a single
unit installation. See FIG. C16.
Ensure that the compressor is operational by:
1. Placing mode switch to cool.
2. Lower temperature setting to start compressor opera-
tion (approx. 2 min. time delay)
3. Once compressor is operational, adjust setting up to
shut down compressor system.
Locate sensor attached to zone being tested. Using a hair
dryer or other heat producing air device, GRADUALLY heat
up the area surrounding the thermistor.
Ensure that de-
vice does not place excessive heat on plastic cover.
If compressor system comes on, sensor is operational. If
the compressor does not come on, reverify connections at
air conditioner. If
the system is still
not operational, un-
plug sensor from
unit and verify its
cable by checking
the ohms. See FIG.
C16 & 17.
FIG. C16
Manual
Compliments
of
Northwest
RV
Supply
Printed
From
http://www.nwrvsupply.com
