– 47 –
Note:
•
The position of the T3b sensor on the copper
tubing is critical. Ensure the sensor is attached
on the top side of the tube, between the 10
o’clock and 2 o’clock position.
(Continued Next page)
Mastic
Note:
Sensors T3A, T3b, and T4 are supplied as an
assembly (part #WS17X10014).
Compressor Outlet Sensor
The compressor outlet sensor (T4) provides the
control with compressor discharge temperature
during sealed system operation.
The control checks the sensor to confirm:
1. Outlet temperature has risen at least 20°F
during the first 30 minutes.
2. Outlet temperature is greater than 120°F after
the first 30 minutes.
3. Outlet temperature never exceeds 240°F while
operating.
4. The condition of the sensor is either open or
shorted. The sensor is considered open if the
voltage at control board location T4 is greater
than 4.88 VDC and shorted if less than .098 VDC.
if any of the above tests fail, the control will stop
the sealed system and operate the water heater in
electric mode.
Specific failures associated with the compressor
outlet sensor can initiate fault codes FA, Fb, FE, and
F7. (See
Service Mode.)
The sensor is inserted into a spring clip that
attaches to the compressor discharge tube. (See
Component Locator Views
.)
The front shroud must be removed to access the
compressor outlet sensor. (See
Machine Compartment
Covers
.)
Sensor
Spring Clip
Compressor
Discharge
Tube
Note:
Sensors T3A, T3b, and T4 are supplied as an
assembly (part #WS17X10014).
T3b
TUBE
•
When installing the evaporator outlet sensor,
be sure to insulate the sensor location with new
mastic (part #WS03X10075).
