Table 16: Troubleshooting details
Symptom Probable causes Solutions
Cold air drafts are
entering the back of the
TEC.
Seal any holes behind the TEC to reduce
drafts.
The temperature displayed
is lower than the actual
room temperature.
Air is being forced through
the TEC from a nearby
vent.
Move the location of the TEC or change
the venting to prevent air from being
forced through the TEC.
For networked models, the
Online icon does not appear
for a networked controller.
There is improper field bus
wiring.
Refer to the MS/TP Communications Bus
Technical Bulletin (LIT-12011034).
For wireless models,
Supervisory Status = Offline
The supervisory controller
is not communicating
with the TEC. The TEC
is not mapped to a JCI
Supervisory System. The
WNC Gateway is not
communicating with the
TEC.
1. Map the TEC into a JCI Supervisory
system.
2. Verify that the PAN’s WNC Gateway
is online.
3. Add ZFR Pro Routers/Repeaters
into the wireless system.
Some icons are hidden. Lockout levels are used or
the icons are hidden due
to the display settings.
See Table 6 for lockout levels and access
details.
The touchscreen is
unresponsive.
You do not tap the
touchscreen, but the display
acts as if it is tapped, which
causes the display to blink
or toggle between screens.
You need to tap the display
at an offset from a touch
point to activate the display.
You tap the display or
touch the controller within
5 mm of the display when
power is applied to the
controller.
Reboot the controller. Do not interact
with the controller until the home
screen displays.
Note: For common MS/TP troubleshooting information, refer to the MS/TP Communications Bus
Technical Bulletin (LIT-12011034).
Repair information
If the TEC3000 Series Thermostat Controller fails to operate within its specifications, replace the
unit. For a replacement thermostat controller, contact the nearest Johnson Controls representative.
TEC3000 Series On/Off or Floating Fan Coil Thermostats Installation Guide60
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