Remote Alarm Clearing; Configuring Remote Alarm Output - McQuay MicroTech II Operation Manual

menu. Pressing the Right Arrow key five more times
changes the display to the Previous Alarm 8 menu.
5. Pressing the Left Arrow key changes the display back to
the Active Alarm 7 menu. Repeating this six more times
changes the display back to the Previous Alarm 1 menu.
Clearing Alarms. Before any active alarm is cleared, the
alarm conditions that caused it must have returned to normal.
When the alarm conditions are no longer present, an active
alarm may be cleared either automatically or manually.
Note: Some of the safety devices that detect alarm condi-
tion require a manual reset at the device before the
alarm can be cleared. Refer to Table 20 on page 51
for listing of possible alarms and to determine
whether an alarm is manual or automatic reset.
An automatic reset active alarm immediately clears when the
alarm conditions that caused it disappear. A manual reset
active alarm is cleared using the keypad/display as follows.
1. The active alarm to be cleared is first displayed. Refer to
"Displaying Alarms" on page 53.
2. Pressing the Clear Alarm key while the active alarm to
be cleared is in the display sends a clear command to the
Table 21: Programmable Parameters
Keypad/Display ID
Menu Name
Alarm Out Faults
54
Item Name
Freeze= Fast
Freeze Fault Remote Output Setup
Smoke= Fast Smoke Fault Remote Output Setup
Space Sensor= Fast Space Sensor Fault Remote Output Setup
Return Sensor= Fast Return Sensor Fault Remote Output Setup
Disch Sensor= Fast
Disch Sensor Fault Remote Output Setup
Hi Return Tmp= Fast Hi Return Tmp Fault Remote Output Setup
Hi Disch Tmp= Fast Hi Disch Tmp Fault Remote Output Setup
Lo Disch Tmp= Fast Lo Disch Tmp Fault Remote Output Setup
Fan Fail= Fast
Fan Fail Fault Remote Output Setup
OA Dmpr Stuck= Fast OA Dmpr Stuck Fault Remote Output Setup
controller. This clears the active alarm and returns the
unit to normal operation if no other alarms are active.

Remote Alarm Clearing

Although it is always recommended that active alarms be
cleared at the unit via the keypad/display, there are other
methods that effectively clear active alarms. Three such
methods are described in the following sections.
Unit System Switch (S1)
Cycling the main controller system switch (S1) located in the
unit main control panel has the effect of clearing the active
alarm menus. The disadvantage of clearing alarms in this
manor is that the active alarm data is not placed into the pre-
vious alarm buffer and alarm information is lost.
Note: Turning off the unit power disconnect switch has
the same effect.
Manual Unit Enable/Disable Input
Disabling the unit via the manual unit enable/disable input
(this occurs when a field supplied and installed switch across
terminals 101 and 104 on the unit field terminal block (TB2)
is changed from the on (closed) to off (open) position. Refer
to the "Manual Unit Enable/Disable" section of IM 696,
MicroTech Applied Rooftop Unit Controller.
Network Signal
The active alarms can be cleared via a network signal
through optional communication modules (including Ether-
net-BACnet, MSTP-BACnet and LonWorks).

Configuring Remote Alarm Output

Parameter Name
OM 138