D2H/D4H/D7H/D8H/J9 Unit Disassembly And Assembly; Before Proceeding - Danfoss VLT FC Series Service Manual

D2h/D4h/D7h/D8h/J9 Unit Dis...

11 D2h/D4h/D7h/D8h/J9 Unit Disassembly and Assembly

11.1 Before Proceeding

Review all safety warnings and cautions in chapter 2 Safety.
•
DO NOT touch electrical parts of the drive when
connected to mains. Also make sure that other
voltage inputs have been disconnected (linkage
of DC intermediate circuit). There can be high
voltage on the DC-link even when the indicator
lights are turned off. Before touching any
potentially live parts of the drive, wait at least 40
minutes.
•
Before conducting repair or inspection,
disconnect mains.
•
[Off] on the LCP does not disconnect mains.
•
During operation and while programming
parameters, the motor can start without warning.
Press [Stop] when changing data.
•
When operating on a PM motor, disconnect the
motor cable.
WARNING
DISCHARGE TIME
The drive contains DC-link capacitors, which can remain
charged even when the drive is not powered. High
11 11
voltage can be present even when the warning LED
indicator lights are off. Failure to wait the specified time
after power has been removed before performing service
or repair work can result in death or serious injury.
•
Stop the motor.
•
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other drives.
•
Disconnect or lock the motor.
•
Disconnect any brake option.
•
Disconnect any regen/load share option.
•
Wait for the capacitors to discharge fully. The
minimum waiting time is specified in the
following discharge time table and is also
visible on the drive label.
•
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged. For parallel drive modules, measure
DC-bus capacitor voltages before and after the
individual DC fuses.
186
®
VLT FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
Enclosure Size
D1h–D8h drives
J8–J9 drives
D9h–D10h enclosed drive systems
Da2/Da4/Db2/Db4 parallel drive systems 20 minutes
E1h–E4h drives
E5h–E6h enclosed drive systems
Table 11.1 Discharge Time
WARNING
SHOCK HAZARD
The following options are powered before the optional
circuit breaker or disconnect. Even with the circuit
breaker or disconnect in the OFF position, mains voltage
is still present inside the drive enclosure.
Failure to turn off the main service line/power to the
drive before working on the following options can result
in death or serious injury:
•
•
•
•
•
•
•
NOTICE
INTERLOCKED DOORS
If supplied with a circuit breaker or disconnect switch,
the cabinet doors are interlocked. To open the cabinet
doors, set the circuit breaker and disconnect switch to
the OFF position.
NOTICE
ELECTROSTATIC DISCHARGE (ESD)
Many electronic components within the drive are
sensitive to static electricity. Voltages so low that they
cannot be felt, seen, or heard can be harmful to
electronic components. Use standard ESD protective
procedures whenever handling ESD sensitive
components. Failure to conform to standard ESD
procedures can reduce component life, diminish
performance, or completely destroy sensitive electronic
components.
Danfoss A/S © 02/2019 All rights reserved.
Minimum waiting time
20 minutes
20 minutes
20 minutes
40 minutes
40 minutes
Door interlock
Space heater
Cabinet light and outlet
RCD monitor
IRM monitor
Emergency stop
24 V DC customer supply
MG94A502