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DN-Series Integrated Programmable Controls
DOAS
TROUBLESHOOTING
NUMBER
NAME
STATUS SHOWN
MEANING
10
Al_SupplyFan
User reset
Supply Fan Alarm
11
Al_ExhaustFan
User reset
Exhaust Fan Alarm
Alarm Number 10:
Supply Fan Alarm
This indicates that either the supply fan did not start, or that the current switch did not register
the supply fan as running. Refer to the Supply or Exhaust Fan Alarm Troubleshooting section in
the Test End Devices.
The delay for this alarm is set here. The setting is shared with the exhaust fan. Whether the unit
shuts down if this alarm occurs is also set here.
Alarm Number 11:
Exhaust Fan Alarm
This indicates that either the exhaust fan did not start, or that the current switch did not register
the exhaust fan as running. Refer to the Supply or Exhaust Fan Alarm Troubleshooting section in
the Test End Devices.
The delay for this alarm is set here. The setting is shared with the supply fan. This alarm will
shut the unit down.
u
Check the wiring: FBUS on the controller to BMS on the expansion.
u
Check that the dipswitches are positioned correctly
Alarm Number 5:
Wrong configuration on device CPCOE
This alarm is an internal alarm. Contact TSS if this alarm occurs.
Alarm Number 6:
Connection between DOAS and Ref Controller is lost
This alarm occurs on packaged refrigeration units and indicates that the communication
between the refrigeration controller and the DOAS is lost. It is usually a wiring problem.
Alarm Number 7:
Inverter Offline
This alarm occurs on packaged refrigeration units indicating the inverter for the variable speed
compressor is offline. It usually indicates a power loss or a wiring issue.
10.1.5.2 Supply and Exhaust Alarms
