Technical Information
RS 232/RS 485 Communication Description
5
HS452, HS652 Rotary Vane Pumps User Manual / 87-900-978-01 (H) 91/102
Electronic Self-Test
When you switch the pump on with the main On/Off switch the pump
doesn’t start immediately but it start only after about three seconds.
This test time isn’t required if the pump is already powered as when
it is operated in remote or serial mode.
Rotor Lock Test
After the electronic self-test the inverter perform a rotor lock test.
This test requires about 5 seconds. During this time the rotor turns
very slowly; after-wards the pump accelerate. The acceleration time
is a function of the oil temperature and of the chamber volume to
rough down. The lower is the oil temperature the longer is the time
required to reach nominal speed.
Oil Level Check
An oil level check is performed four minutes after the pump starting.
If the pump oil level is under the minimum threshold the pump
controller generate a message you are able to receive by status led
blinking (see the Status Led table), RS232 window (see Windows
Meaning table) and a signal on I/O port (see I/O table).
NOTE
If the oil level check fails (low level) the pump doesn't stop. The test only
activates the output described above.
An Oil level sensor fail is highlighted by means of quick status led
blinking and RS232 window (see "Status led" and "Window meaning"
tables).
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