HTP PHE199-119 - Manual (Page 59)

59
LP-314 REV. 3.24.14
This appliance has wire function labels on all internal wiring. Observe the position of each wire before removing it. Wiring errors may
cause improper and dangerous operation. Verify proper operation after servicing.
Table 18
SCREEN DESCRIPTION POSSIBLE REMEDY
Fault Code FOU
Outdoor Sensor Failure
OUTDOOR SENSOR FOU
PUMP ON
This indicates that the outdoor sensor is defective,
shorted or open, or the outdoor temperature is
below
–40 o F. NOTE: The installer must choose
YES in Function 12 to enable this feature. The unit
will continue to operate when this error is displayed
but the control will ignore the outdoor reset feature
and run at the programmed temperature. The
bottom line indicates the status of the pump.
Inspect wiring from outside sensor for damage or shorted
connections and repair as necessary. Measure resistance of
outdoor sensor and compare to resistance chart. If not within
range on chart, shorted or open, replace sensor.
Fault Code E07
CH Sensor Failure
CH SENSOR FAIL
PUMP ON
This indicates that one or both of the clip-on
temperature sensors in the hydronic heating module
has been disconnected. This error allows the tank
portion of the unit to operate, but will not allow the
hydronic heating module to operate until the error is
cleared. The error will clear if proper sensor
connection is restored. The bottom line indicates the
status of the pump.
1. Go to the STATUS menu screen that displays “CH
Supply” on the bottom line. This will help to determine which
sensor has the error. If the temperature displayed is
reasonable, the error will be in the return temperature sensor
(Horizontal Pipe). If the temperature displayed is not
reasonable, the error will be in the supply sensor (Vertical
Pipe).
2. Check the electrical connection to the thermistor on the
outlet manifold. Check the wiring harness. If both are
connected properly, replace the control. NOTE: Verify the
thermistor values by referencing the Resistance Tables in
Section 12.
3. Replace thermistor if necessary.