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 21
XL
Service Manual
CU1
KCI KONECRANES GROUP
KCI HOISTS CORPORATION
6.2 An error-message (Err_x) is displayed
1 Notice always the first error-message displayed and see Appendix 2.
6.3 The red Temp-light is lit or blinking
1 See Chapter 3.5 to check the normal operation of the overheating protection
circuit. Note the warning and cooling down periods (3 and 2 minutes).
2 Measure the resistance of the thermistors inside the hoisting motor.
a) Normal resistance is 150-1000 ohm (if the motor is overheated the resistance
of the thermistors is more than 4200 ohm)
-If the resistance is out of normal range, check the thermistor wiring and
renew the motor (thermistors) if necessary.
3 Bypass the thermistors by connecting a jumper between CU1:2 and CU1:1.
See note 1!
a) If the alarm disappears after the cooling down and warning periods, check
again the thermistors.
-If the thermistors are OK and the alarm still exists, change the CU1.
b) Remove the jumper between CU1:2 and CU1:1.
6.4 CU1's overload protector prevents lifting below the rated load
(I.e. the red LOAD-light is on with a load below the rated load of the hoist.)
1 See Chapter 3.6 to check the normal operation of overload protection circuit.
2 Make sure that there is no load on the hook and change the CU1 into the load
mode.
a) If the load displayed differs more than ±5% from 'L 00', check the load sensor
and its mounting. Recalibrate the load sensor (i.e. carry out setup routine) if
necessary .
b) If the load displayed is 'L 0' (±5%) as it should be with no load, check the
calibration of the load sensor according to the startup routine and recalibrate
the load sensor if necessary.
To Next Page
Loading...