45
7.
Remove both of the plastic tubes from the airflow station pressure transducer
and gently blow into the HIGH side port.
Caution: The transducer is
extremely sensitive. Blowing too hard into the sensing tube may damage
the transducer.
Is there approximately 5VDC across the controller input
terminals that are connected to the transducer?
a.
Yes. There is a problem with the controller. Replace it.
b.
No. There is an open in the wiring between these pressure transducer
and the AireLogic controller terminals. Locate and rectify.
SOLUTION: If less outside air is desired
1.
Is heat required?
a.
Yes. The AireLogic control system must be in the Heating mode. In
this mode the smallest allowable amount of outside air is 20%. Verify
the system is in the Heating mode and the MIN VENT SP is set for
20%. See Heating/Cooling Mode and Minimum Ventilation Sections
of this manual.
b.
No. Continue.
2.
Is cooling or ventilation required?
a.
Yes. The AireLogic control system must be in the Ventilation/Cooling
mode. In this mode the smallest allowable amount of outside air is 0%.
Verify the system is in the Cooling mode and the MIN VENT SP is set
for the desired percent of outside air. See Heating/Ventilating/Cooling
Mode and Minimum Ventilation Sections of this manual.
b.
No. Contact factory.
ALARM CODE:
Invalid Damper Control Mode
PROBLEM:
The user has selected Mixed Air Temperature control mode for
damper operation and the unit is configured for MDT or MDT-Expert control,
or
communications between the room sensor and the unit control module have failed. This
alarm will automatically clear after the alarm is corrected.
SOLUTION
:
If the unit is configured for MRT or MRT-Expert controls
1.
Is the room sensor wired correctly and securely in the terminal connectors
located on the back of the room sensor as well as at the Rnet input on the left
side of the unit control module?
a.
No. Correct wiring and securely tighten connections.
b.
Yes. Internal room sensor failure. Replace room sensor.
SOLUTION
:
If the unit is configured for MDT or MDT-Expert controls
1.
Select either the Manual or Building Pressure damper control modes. Mixed
Air Temperature control mode is incompatible with MDT and MDT-Expert
control systems. Mixed Air Temperature control mode requires that the unit
be configured for MRT or MRT-Expert controls and that a room sensor be
installed and functioning.
ALARM CODE:
Room Sensor Failure
PROBLEM:
The unit is configured for MRT or MRT-Expert control and
communications between the room sensor and the unit control module have failed. This
alarm will automatically clear after the alarm is corrected.
SOLUTION:
Investigate room sensor
1.
When room sensor communications are interrupted, the displayed room
temperature will be equal to the last good temperature reading received from
the room sensor for approximately 5 minutes following the interruption. For
