7-5
7.4.1
How to switch basic information on the
display
Normally, the display shows the pressure in the
discharge piping.
In special cases such as the activation of an
interlock, the occurrence of an alarm, or during
the freeze-proofing cycle, however, the display
shows the corresponding message based on the
sequence specified in Table 7-4.
To switch the indications on the display, press the
keys at the “Indication Switching Operation”
shown below.
The display automatically returns to normal
indication when no operation is carried out for 30
seconds.
Note
The “Interlocking in operation,” “Alarm appearing,” or “Freeze-proofing in
progress” message appears only when the respective conditions are met.
The “Number of starts time on the previous day” remains “0” for 24 hours after
the power is turned on.
Buzzer
stop
Buzzer
stop
Interlocking in operation
Alarm appearing
e.g. E002: Receiver tank low
Freeze-proofing in progress
Pressure in discharge piping
e.g. 38 m·H
2
O
Number of starts time on the previous day
e.g. 107 times
Power voltage
e.g. 200V
Alarm log display transition point
(See 7.4.2.)
Direction
Direction
The display
automatically
returns to normal
indication when no
operations are
carried out for 30
seconds.
Fig. 7-4-1(b) Switching the basic information on the display
Indication Switching Operation
Display
Fig. 7-4-1(a) Display
(e.g. when the pressure in discharge piping is 38 m·H
2
O)
