Form 402951
Page 7
Fig. 6 - Printed circuit board 236-13870-1
The printed circuit board automatically controls the
sequence of the pause and operating times of the 203
central lubrication pump as a function of the vehicle or
machine working hours tB (Fig. 7).
The sequence of the pause and operating times is
activated when the machine contact or ignition switch is
switched on.
A lubrication cycle consists of one pause time and one
operating time. Once the pause time has elapsed, the
operating time starts to run. This lubrication cycle is
repeated permanently after the machine or vehicle has
been put into operation. Refer to Fig. 7.
During the operating time the pump element dispenses
the lubricant to the lubrication points via progressive me-
tering devices.
Fig. 7 - Time sequence diagram
tB - Working hours
T - Lubrication cycle
tP - Various pause times
T1 - Stored pause times
T2 - Operating times
Pause time
The pause time
- determines the frequency of the lubrication cycles within a
working cycle;
- is started and stopped via the machine contact or
ignition switch;
- is adjustable.
When the machine contact or the ignition switch is
switched off, the pause times which have already
elapsed as well as the momentary operating conditions
(faults) are stored and added up by an electronic memory
(EEPROM) until the time which has been set on the blue
rotary switch is reached.
After the machine contact or ignition switch is switched
on again, the printed circuit board operates from the
point where it had been interrupted.
If the setting is modified within the pause time, the printed
circuit board takes over the new value only at the end of the
operating time.
The pause time setting may be different for each applica-
tion. It must be adjusted in accordance with the respective
lubrication cycles. Also refer to To set the pause time.
Fig. 8 - Proximity Switch
Operating time
A
proximity switch
(initiator) which has been installed on
a metering device instead of a piston closure plug moni-
tors and brings the pump operating time to a close after
all the pistons of this metering device have dispensed
their
lubricant quantity.
The operating time depends on the systems lubricant
requirement and on the location of the proximity switch
(either on the main metering device or on the secondary
metering device).
During the operating time, the
signal lamp is
permanently
lit.
Monitoring time
A fixed
monitoring time
of maximum 30 minutes.
Note: Normally, the monitoring time ends at the same time
as the operating time.
If there is
no switching off signal
from the proximity switch
to the printed circuit board within 30 minutes, a
fault
signal
will occur.
The signal lamp flashes with the corresponding flashing
frequency. See Fault indication.
SHOP ONLINE at www.airlinehyd.com
800-999-7378