Greenheck Microprocessor Controller (474706 IOM) TAP v1.04 June 2011 (ERCH, ERH, APEX, VER, ERT) - Manual (Page 7)

7 DDC Controller for Tempered Air Products
Examples of Alarms
If an alarm occurs, the Prg Esc button will glow red on the controller and the remote display (if installed).
To view alarm, press the
Prg Esc button once. This will display the most recent
alarm. Press the
Prg Esc button again to reset the alarm. If the alarm cannot be
cleared, the cause of the alarm has not been fixed. Press the
Prg Esc Prg Esc
buttons to
view any additional occurring alarms.
This is an example of an outdoor air sensor failure.
This screen appears if there are no active alarms.
To view all saved alarms, press the
Prg Esc
button to enter the DATA LOGGER. For
more information, see the Data Logger menu.
Examples of Alarms
Outdoor Air Temperature
Sensor Failure
Failure of outside air temperature sensor. Alarm only
Supply Air Temperature
Sensor Failure
Failure of supply air temperature sensor. Alarm & Shutdown
Cold Coil Temperature
Sensor Failure
Failure of after cooling coil air temperature sensor. Alarm only
Room Temperature
Sensor Failure Failure of room temperature sensor.
(If UnOccupied - Cycle On Room is enabled)
Alarm only
System has exceeded the
set number of run hours The unit has been operating for a period longer than
the maintenance set point.
Alarm only
Supply airflow Indicates a loss of airflow in the supply fan. Alarm & Shutdown
Wheel Pressure - Dirty
Wheel/High CFM Indicates a buildup of pressure across the energy
wheel.
Alarm only
Energy recovery wheel
rotation. Check wheel.
Indicates a wheel rotation failure. Alarm only
Exhaust Airflow Indicates a loss of airflow in the exhaust fan. Alarm & Shutdown
Filter Alarm Indicates a buildup of pressure across the filters. Alarm only
A compressor limit
switch has tripped Indicates a high or low refrigerant pressure switch
has tripped.
Alarm only
Supply temperature low
limit alarm Indicates a supply air temperature lower than the
supply low limit set point.
Alarm & Shutdown
pCOe Offline
Indicates communication with pCOe auxiliary I/O has
failed.
Alarm only
pCOe - Analog input
probe on channel #
disconnected or broken
Indicates an analog probe failure on the pCOe.
Check integrity of auxiliary I/O analog probes.
Alarm only
Alarms
Press DOWN to review
current alarm(s).
Press ESC to exit.
Press ALARM to reset.
Alarms
No active alarm
Press ENTER
to DATA LOGGER
Outside Air Temperature
Sensor B01 Failure
®