Basic Troubleshooting - Jackson Systems Comfort System T-32-P Installation Manual

BASIC TROUBLESHOOTING

SYMPTOM
No LCD display
Thermostat can not be set
for auto changeover
Temperature display
inaccurate.
Wrench icon flashes on LCD
Outdoor temperature does not
display. Dashes (- - -) appear
on the LCD.
Heating or Cooling is flashing
Lock icon flashes when trying
to set a higher heating or
lower cooling temperature.
Thermostat displays wrong
temperature
The fan continues to run after
a heating or cooling call is
satisfied.
Some buttons on the
thermostat do not function.
Thermostat clock does not
keep proper time.
15
POSSIBLE FAULT AND REMEDY
Remove thermostat from subbase and check for 24 Volts
across '24' and '24C'. Make sure the factory jumper is between
'R' and '24'. If no voltage, check voltage at HVAC system
terminals 'R' and 'C'. If no voltage, fault is equipment related. If
voltage, fault could be in wiring.
In the Advanced Installer menu, set FN=A for auto changeover.
FN=C is for cooling only.
FN=H is for heating only.
FN= . . . is for manual heat / cool changeover.
Air from the wall cavity may be leaking into the rear of the
thermostat. Seal holes in the wall to prevent air infiltration. The
temperature sensor might be folded back inside the thermostat
and is not being exposed to the room temperature. Carefully
the sensor head so that it is just behind the sensor opening in the case.
External influence from appliances, lighting or drafts may be
affecting temperature accuracy. Move lamps or other sources of
abnormal temperature influence away from the thermostat.
This is not a fault. Commissioning mode is enabled and
time delays are overridden. Change CD=1 to CD=0 in the
Advanced Installer menu.
Check wiring to outdoor sensor. Make sure that TT=OA in
the Advanced Installer menu.
This is not a fault. The thermostat is in the short cycle protection
mode. This prevents the equipment from running for
4 minutes after the thermostat calls.
This is not a fault. HL and CL restrict the heating and cooling
setpoints. The limit values can be changed in the Advanced
Installer menu.
The T-32-P can display in either Fahrenheit or Celsius. Change
CF=C or F in the Advanced Installer menu.
The thermostat is set to Fan On. Set thermostat to Auto Fan.
The fan purge mode is set to run the fan for a fixed period of
time after the equipment shuts off. Change the FP value in the
Advanced Installer menu.
Lock values have been set. Refer to LC settings in the
Advanced Installer menu.
Make sure that the plastic tab on the internal fitted battery is
removed so that the battery is operational.
move