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 11
XL
Service Manual
CU1
KCI KONECRANES GROUP
KCI HOISTS CORPORATION
8 Ready
4 Overloads4 Overloads
8 Ready8 Ready
5 Temp.
8 Ready
5 Temp. 5 Temp.
Normal display e.g: Warning state e.g:
(number of overload incidents is more
than 1000)
(lifting is possible, see Note 1)
(lights) (lights)
(blinks)
Remote-light (blinks; option)
Figure 5: Indications of the number of 'Overloads'.
3.5 Overheating protection of the hoisting motor (Temp)
The temperature of the hoisting motor is measured by PTC thermistors. If overheating is
detected (resistance of the thermistors is more than 4,2 kW), CU1 prevents the hoisting
motion and shifts into a 3 minutes warning period. The lowering of the load is still
allowed.
Hoisting is allowed during the warning period (3 min) if the temperature of the motor
returns (and remains) back to normal.
If the overheating occurs again within the warning period, CU1 prevents hoisting motion
for 2 minutes to cool down the motor (the cooling down period).
After the cooling down period (2 min) a new warning period (3 min) begins (see
Figure 6).
Overheating: Warning period: (3 min): Cooling down period (2 min):
(Lifting is prevented) (Lifting is allowed) (Lifting is prevented)
(lights) (blinks) (lights)
(blinks) (blinks) (blinks)
Remote-light (blinks; option) Remote-light (blinks; option) Remote-light (blinks; option)
Figure 6: Indications of 'Overheating'.
3.6 Overload protection (Load)
If the hoist is overloaded by more than 10 % (i.e. load is more than 110 %) for at least
0.75 seconds time, the hoisting motion is immediately prevented. Lowering of the load
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