26.03.1996 • KHH SEENXL13A
•For Authorized KCI Service Agents Only•
KCI Hoists Corporation reserves the right to alter or amend the above information without notice
Page 34
XL
Service Manual
CU1
KCI KONECRANES GROUP
KCI HOISTS CORPORATION
4 Switch the power on. Change the CU1's display into the load mode. Measure
the no-load ('SL 00') and full-load ('SL100') setting voltages between CU1:2
and CU1:3 and write down the voltages on the CU1 control page:
a Adjust by the calibrating load sensor the CU1 to display 'L 00' (this is the
'SL 00' voltage) and read the load sensor voltage.
b Adjust by the calibrating load sensor the CU1 to display 'L 100' (this is the
'SL100' voltage) and read the load sensor voltage.
5 Switch the power off and change the CU1.
6 Switch the power on and setup the new CU1.
Use the calibrating load sensor and the voltage meter to set the 'full-load'
('SL100') and 'no-load' ('SL 0') settings into the new CU1 during the load sensor
calibration phase of the setup routine. Set the same voltages as measured in
step 4.
7 After the calibration has been done, change the CU1's display into the load
mode and check that setup was carried out correctly. Adjust the CU1 to
display 'L 0' and 'L 100' by the calibrating load sensor, and compare the
display readings with the measured voltages.
8 Switch the power off and disconnect the calibrating load sensor and the
voltmeter.
9 Reconnect the actual load sensor of the hoist and switch the power on.
10 Carry out the normal startup routine to check that setup routine was carried
out correctly. (The accuracy of the load displayed must be ±5% - if not,
continue on step 11.)
Continue on step 11 only when recalibration is needed, otherwise go to step 14:
11 (The reason for the recalibration may be that the new CU1 has somewhat
different supply voltage for the load sensor than the old one.)
Measure the load sensor voltage between CU1:2 and CU1:3 with no load on
the hook. (It will be slightly different from the previous, on step 4a measured 'L
0' voltage.)
12 Calculate the voltage difference between 'L 0
step4a
' and 'L 0
step11
' voltages.
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