R&M Materials Handling HOIST MONITORS - Manual (Page 70)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
14.1.2 Fault Motor OT F_OT
Hoist motor overtemperature
• Check that 4-4-1 T1 operat. corresponds to the actual sensor of the hoist
motor
• Check that 4-5-1 T2 operat. corresponds to the actual sensor of the hoist
motor
• When NTC-type sensor is selected, check parameter 4-10-2 “OT limit”
• Lowering can be allowed by setting 4-10-1 “OT run ?” = Down
• Unplug the terminal X2 and measure the temperature sensor’s resistance
between terminal 21 and 22 also between terminal 23 and 24.
- PTC-sensor or bimetal switch: the resistance should be less than 1kohm
- NTC sensor: The resistance should be between 0.5kohm and 100 kohm. See
Appendix 4 “Motor temperature NTC-charts”
• Measure the internal resistance of temperature input’s from terminal’s pins
by multimeter (disconnect the orange terminal X2)
- When input is okay the input’s internal resistance is ~6.3 kohm.
14.1.3 Fault Int. relay F_SR
A fault detected in the internal safety relay
•
Internal hardware fault in the unit, internal safety relay contact closed all the time.
• Contact the manufacturer.
14.1.4 Fault RUN act. F_Run
A fault detected in controlling the direction outputs (only two step control)
•
Feedback is ON already before the direction control (HOUT, LOUT) is activated.
• Check the connections and wiring of terminals 1 to 19.
- Especially for short circuits between HIN - HOUT and LIN - LOUT.
• If external connections are correct and the fault occurs only in starts upwards, the internal upwards
control relay may be malfunctioning
• If external connections are correct and the fault occurs only in starts downwards, the internal
downwards control relay may be malfunctioning
• Make sure that the current transformer is correctly connected to the terminal 27 (I2-A)
• Check that the current transformer operates correctly
Make sure that any other electrical loads (e.g. fans, inverters) haven’t been connected
behind the current transformer.
14.1.5 Fault Run FB – (2)
The hoist stops although the unit controls it to run
•
Check AIN-2 values by parameter 1-2-11
- Normal values ~5V
- If ~9.8V check current transformer connection
• Check function of contactors
- If the contactor is energized the problem is in the power line connections or the current transformer
connections, probably
• Check the current transformer connection to the terminal 27 (I2-A)
• Check the power line connections to the hoisting motor