60
RETURN FAN LOCKOUTS
Access: Return Duct Static Pressure screen, [
Switch]
softkey
The Return Fan Lockouts screen (see Fig. 57) will not have any
significance since there is no return fan on a 50BV unit.
Fig. 57 — Return Fan Lockouts Screen
Click the
[
PREV]
softkey to return to the Return Duct Static
Pressure screen or click the
[
Help]
softkey to access the Help
screen.
SUPPLY FAN PID TUNING PARAMETERS
Access: Fan Setpoints screen, [
PID] softkey
The PID Tuning Parameters screen (see Fig. 58) allows the user to
change the Proportional, Integral and Derivative gains plus the
Loop dead band. Care should be taken before changing any setting
on this screen.
Fig. 58 — PID Tuning Parameters Screen
Click the
[
PREV]
softkey to return to the Fan Setpoints screen.
See Table 44 for screen function information.
UPM FAULTS
Access: Home screen
The UPM Faults screen (see Fig. 59) allows the user to view the
current status of the UPM board and to view the safeties connect-
ed to the UPM board. The screen also allows the user to reset the
UPM, reset the UPM alarms and reset the UPM alarm counts.
Fig. 59 — UPM Faults Screen
Click the
[
PREV]
softkey to return to the Home screen, click
the
[
Alarm]
softkey to access the Alarm screen or click the
[
UPM2]
softkey to access the UPM2 Faults screen. See
Table 45 for screen function information.
To reset the Unit Protection Module (UPM):
1. Move brackets onto "No" on the Reset UPM now? line and
press
ENTER
.
2. Click on the [INCR] softkey to change setting to "Yes."
3. Press
ENTER
to reset. The display will show "Yes" momen-
tarily then display will change to "No." The UPM is now
reset.
To reset the UPM Alarms:
1. Move brackets onto "No" on the Reset UPM Alarms line and
press
ENTER
.
2. Click on the
[INCR]
softkey to change setting to "Yes."
3. Press
ENTER
to reset. The display will show "Yes" momen-
tarily then display will change to "No." The UPM alarm is
now reset.
To reset the number of UPM alarm counts:
1. Move brackets onto "No" on the Reset count now? line and
press
ENTER
.
2. Click on the
[INCR]
softkey to change setting to "Yes."
3. Press
ENTER
to reset. The display will show "Yes" momen-
tarily then display will change to "No." The UPM alarm
counts is now reset.
Table 44 — PID Tuning Parameters Functions
FIELD / KEY
FUNCTION / INFORMATION
SAF P GAIN
(adjustable)
Displays the current Proportional Gain
SAF I GAIN
(adjustable)
Displays the current Integral Gain
SAF D GAIN
(adjustable)
Displays the current Derivative Gain
SAF LOOP DEADBAND:
(adjustable)
Displays the current PID loop dead-band
in inches of water
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