OJ Electronics PRH Series, Instructions Manual

Page: 16 / 28

16
Status Settings Setting Description Interval
temperature compensation
Out. temp. comp. Outside temperature -20 to +0°C
Min at -10°C compensation is fully active
at temperatures below the
set minimum (see fig. 3).
Out. temp. comp. The pressure (in Pascal) by 10 til 200 Pa
Δ
Press. 25Pa which the outside temperature
compensation is to reduce
the day setpoint when fully
activated (see fig. 3).
Back Return to status display.
Back Return to status display.
Alarm display Description
Alarm
Insufficient pressure
Alarm
Excessive pressure
Alarm
Motor fault
Actual pressure has been lower than the setpoint minus the
Δ
Pa alarm limit setting for longer than the minimum duration set-
ting. The controller continues its attempts to achieve the pressure setpoint. Press the control button to return to the previous
display. A flashing A will be shown in the bottom right-hand corner of the display as long as the alarm remains active, but the
settings can be changed in the usual way. If no further action is taken, the alarm message will automatically reappear after 15
seconds if the alarm condition persists. The alarm is automatically reset when pressure returns to within the alarm limit.
Actual pressure is higher than the setpoint plus the Δ Pa alarm limit setting. Otherwise, as described above under Insufficient
pressure.
This message is immediately displayed if the motor activates an alarm (terminals 12 and 13 on constant pressure controller
open). The control output of the constant pressure controller is set to minimum and the alarm message cannot be removed
using the control button. The alarm is automatically reset when the motor fault is rectified (terminals 12 and 13 on constant
pressure controller close).
Table 2. Alarm displays
Table 1 - continued