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BAC-10000 Series 17 Operation Guide, Rev. J
Troubleshooting
Alarm Issues
Alarm, (False) Fan Fail
• Check conguration. Be sure the Fan Status
option is not selected when there is no sensor/
switch for it.
• Check that the IN2 (fan status) input pull-up
resistor switches are fully latched in the correct
positions. Any passive, dry contact should use
the 10K Ohm seing. (See the Connections and
Wiring section of the relevant BAC-10000 Series
Installation Guide.)
• Check IN2 (fan status) input wiring.
• Check the connected fan status sensor/switch.
• Using BACstage or TotalControl, check that AI2
(fan status) is not congured as “Out Of Service.”
Alarm, (False) Low Limit (Freeze Stat)
• Check the Low Limit Alarm seing—see Damper
Setup on page 5.
• Check conguration. Be sure the Economizer
option is not selected when there is no mixed air
temperature sensor.
• Check that the IN3 (mixed air temp.) input
pull-up resistor switches are fully latched in the
correct positions (see the Connections and Wiring
section of the relevant BAC-10000 Series Installa-
tion Guide).
• Check IN3 (mixed air temperature) input wiring.
• Check the connected mixed air temperature sensor.
• Using BACstage or TotalControl, check that AI3
(mixed air temp.) is not congured as “Out Of
Service.”
NOTE: Aer a low limit alarm is generated, the
fan will not run until aer the FlexStat
is restarted. See Reseing the FlexStat on
page 14.)
Alarm, (False) Space Temp. or Humidity
• See Alarms on page 11.
• See Temperature Reading Is Incorrect on page 19.
• See Temperature Setpoint Is Not Maintained on
page 19.
• Using TotalControl, adjust the limits or time
delay.
Communication Issues
Firmware Upgrade Fails
• Ensure the WD (watch dog) jumper is temporar-
ily removed during the upgrade process (see the
KMD-5699 Installation Guide, P/N 913-019-04).
Reinstall the pin on the le and center pins aer
the upgrade process is complete.
• Check connections.
• Ensure rmware for the correct model is selected
in the Firmware Upgrade Tool.
NOTE: If rmware for a wrong model is acciden-
tally installed, the outputs will not match the
applications/conguration on the display.
NOTE: Backing up the existing seings and
rmware image before or during the
upgrade process is good practice.
NOTE: Restoring to the factory defaults and
reconguring might be needed if how the
FlexStat operates changes. Read all notes
accompanying the rmware update!
KMD-5576 Communication Faulty
• Upgrade to the latest version of BACstage (ver.
2.4.0.25 or later required).
• Check the seings for the USB port on the
computer (Device Manager > Ports) and the
MS/TP port in BACstage (Access > Connection
Parameters).
• Reduce the Max Master number down to the
minimum needed for that network—see (Ad-
vanced) BACnet Communications on page 7.
• Install latest driver and check latency seings.
See Latency Seings for KMD-5576 Service Bul-
letin (SB0308A) on the KMC web site.
• See also MS/TP Network Communication Faulty
below.
MS/TP Network Communication Faulty
• Reduce the Max Master number down to the
minimum needed for that network—see (Ad-
vanced) BACnet Communications on page 7.
• Check that EOL switches are fully latched in the
correct positions (see the relevant BAC-10000
Series Installation Guide).
• Check MAC address and device instance num-
bers.
• Check baud rate.