Johnson Controls TEC3000 Series Installation Guide

Table 15: Fault list
Faults Probable causes Solutions
Supply Fan Fault The Supply Fan Status
configured for either BI1 or
BI2 has not proved within the
configured Fan Alarm Delay.
1. Verify that the Supply Fan is
operating when turned on.
2. Verify that the Supply Fan Status
wiring is connected correctly.
Zone Temperature Too
Cold
The Zone Temperature
has decreased below the
configured Zone Temp Low
Limit.
Verify that the TEC and the RTU heating
are enabled and functioning.
Zone Temperature Too
Hot
The Zone Temperature
has increased above the
configured Zone Temp High
Limit.
Verify that the TEC and the RTU cooling
are enabled and functioning.
Table 16: Troubleshooting details
Symptom Probable causes Solutions
The two-pipe fan coil/VAV
system does not have a
changeover sensor and
switch connected, or the
sensor/switch has failed.
1. Check the wiring of the supply
temperature sensor/switch.
2. Verify that the changeover is set
up correctly for the type of sensor
attached (sensor or switch).
The changeover
temperature is sensing
a hot supply, but the
controller is requesting
cooling.
1. Verify that the supply is not in
heating mode. If it is, nothing can
be done from the TEC.
2. Check the wiring of the supply
temperature sensor or switch.
3. Check the placement of the supply
temperature sensor or switch.
4. Verify that the changeover is set
up correctly for the type of sensor
attached (sensor or switch).
The controller displays Idle
with a Unit Status of
Cooling Unavailable
due to Changeover
despite being above cooling
setpoint, or with a status
of Heating Unavailable
due to Changeover
despite being below the
setpoint.
Changeover temperature
is sensing a cold supply,
but the controller is
requesting heating.
1. Verify that the supply is not in
cooling mode. If it is, nothing can be
done from the TEC.
2. Check the wiring of the supply
temperature sensor or switch.
3. Check the placement of supply
temperature sensor or switch.
4. Verify that the changeover is set
up correctly for the type of sensor
attached (sensor or switch).
57TEC3000 Series On/Off or Floating Fan Coil Thermostats Installation Guide

Johnson Controls TEC3000 Series Specifications

General

Brand	Johnson Controls
Model	TEC3000 Series
Category	Thermostat
Language	English