CaptiveAire RTULink - TROUBLESHOOTING; Faults

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TROUBLESHOOTING
Faults
Table 4. RTULink Faults
Fault Message on
HMI
Potential Cause
Corrective Action
Heating Discharge
Temp
Heating stage failure
(Temp rise between
return and discharge
is not adequate).
Check the heating stage operation and ensure that each stage
achieves a proper temperature drop from the inlet temperature
Cooling Discharge
Temp
Cooling stage failure
(Temp drop between
return and discharge
is not adequate).
Check the heating stage operation and ensure that each stage
achieves a proper temperature drop from the inlet temperature
Space Temp Not
Connected
Temperature sensor
has been
disconnected or has
failed.
Verify correct resistance across Type II 10kΩ thermistor and replace if
the sensor is faulty (not required for monitor only control mode)
Outside Temp Not
Connected
Temperature sensor
has been
disconnected or has
failed.
Verify correct resistance across Type II 10kΩ thermistor and replace if
the sensor is faulty
Return Temp Not
Connected
Temperature sensor
has been
disconnected or has
failed.
Verify correct resistance across Type II 10kΩ thermistor and replace if
the sensor is faulty
Discharge Temp
Not Connected
Temperature sensor
has been
disconnected or has
failed.
Verify correct resistance across Type II 10kΩ thermistor and replace if
the sensor is faulty
Out of Schedule
RTULink has lost its
connection to
CASLink and has run
out of schedule tasks.
Verify that the RTULink is reporting via the CASLink profile. Once
communication with CASLink has been verified, setup and push a valid
schedule
RTU Alarm 1
Alarm 1 on the TO
RTU side of the
RTULink is active.
Determine if the wiring connected to this terminal is valid. If it is valid,
view the RTU manufacturers manual to determine the meaning of
Alarm 1
RTU Alarm 2
Alarm 2 on the TO
RTU side of the
RTULink is active.
Determine if the wiring connected to this terminal is valid. If it is valid,
view the RTU manufacturers manual to determine the meaning of
Alarm 2
STAT Alarm
Alarm on the TO
THERMOSTAT side
of the RTULink is
active.
Determine if the wiring connected to this terminal is valid. If it is valid,
view the RTU manufacturers manual to determine the meaning of the
signal that is connected to Alarm 1 on the “RTU” side of the RTULink
Mixed Air Temp
Not Connected
Temperature sensor
has been
disconnected or has
failed.
Verify correct resistance across Type II 10kΩ thermistor and replace if
the sensor is faulty