Safety Precautions - Danfoss VLT HVAC Basic Drive FC 101 Programming Manual

Introduction
1 1

1.4 Safety Precautions

WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input, DC supply, or load sharing.
Failure to perform installation, start-up, and maintenance
by qualified personnel can result in death or serious
injury.
•
Only qualified personnel must perform instal-
lation, start-up, and maintenance.
•
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that there is no remaining voltage on
the frequency converter.
WARNING
UNINTENDED START
When the drive is connected to AC mains, DC supply, or
load sharing, the motor can start at any time.
Unintended start during programming, service, or repair
work can result in death, serious injury, or property
damage. The motor can start with an external switch, a
fieldbus command, an input reference signal from the
LCP or LOP, via remote operation using MCT 10 Setup
Software, or after a cleared fault condition.
To prevent unintended motor start:
•
Press [Off/Reset] on the LCP before
programming parameters.
•
Disconnect the drive from the mains.
•
Completely wire and assemble the drive, motor,
and any driven equipment before connecting
the drive to AC mains, DC supply, or load
sharing.
4
®
VLT HVAC Basic Drive FC 101
DISCHARGE TIME
The frequency converter contains DC-link capacitors,
which can remain charged even when the frequency
converter is not powered. High 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.
•
•
•
•
•
Voltage [V]
Table 1.3 Discharge Time
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the
frequency converter properly can result in death or
serious injury.
•
Danfoss A/S © 04/2018 All rights reserved.
WARNING
Stop the motor.
Disconnect AC mains and remote DC-link power
supplies, including battery back-ups, UPS, and
DC-link connections to other frequency
converters.
Disconnect or lock PM motor.
Wait for the capacitors to discharge fully. The
minimum duration of waiting time is specified
in Table 1.3.
Before performing any service or repair work,
use an appropriate voltage measuring device to
make sure that the capacitors are fully
discharged.
Power range [kW (hp)]
3x200 0.25–3.7 (0.33–5)
3x200 5.5–11 (7–15)
3x400 0.37–7.5 (0.5–10)
3x400 11–90 (15–125)
3x600 2.2–7.5 (3–10)
3x600 11–90 (15–125)
WARNING
Ensure the correct grounding of the equipment
by a certified electrical installer.
Minimum waiting time
(minutes)
4
15
4
15
4
15
MG18B502