Konecranes CU1 - Page 30

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 30
XL
Service Manual
CU1
KCI KONECRANES GROUP
KCI HOISTS CORPORATION
Err_d: LOAD SENSOR ERROR (≥ P2.03) - The load sensor signal is out of normal range
(3,9-6,1 VDC).
Normal action:
1 Check the wiring and fitting of the load sensor.
2 Measure the voltage between CU1:2 and CU1:4 (ca. 9,85 VDC).
-If the voltage is ca. 9,85 VDC, continue at step 4.
3 Switch the power off. Disconnect the load sensor wire from CU1:4. Switch the
power on and measure the voltage between CU1:2 and CU1:4 (ca. 9,85 VDC).
-If the voltage is ca. 9,85 VDC, change or fix the load sensor.
-If the voltage is not ca. 9,85 VDC, check that current in the load sensor
circuit is less than 100 mA, and if necessary, change the load sensor or the
CU1.
-Reconnect the load sensor wire to CU1:4.
4 Measure the load signal voltage between CU1:2 and CU1:3 (3,9 - 6,1 VDC).
-If the load signal voltage is within the range, 3,9 - 6,1 VDC, change the
CU1.
5 Switch the power off. Disconnect the load sensor wire from CU1:3. Switch the
power on.
-If the load signal voltage measured from the wire is still out of the range,
change or fix the load sensor.
-Reconnect the load sensor wire to CU1:3.
6 Carry out the normal startup routine to ensure that the load sensor and the CU1
work correctly.
Err_E: HOIST REQUEST ERROR (≥ P2.10) - The CU1 has detected that the lifting request
was not ON for sufficient time to test its internal circuit (time required is about 0,15 sec).
Normal action: Normally does not require any actions. If the lifting request has
been ON for more than 0,15 seconds constantly and Err_E occurs repeatedly,
change the CU1.
Err_F: HIOK INPUT FAILURE (≥ P2.11) - The HIOK signal is ON when it should be OFF
(hoisting contactor A-K1 is energized). (The HIOK circuit checks that the CU1's switch
between CU1:9 and CU1:10 operates correctly).
Normal action: Replace the CU1.