Operation; Repairs - Siemens SED2 series Operating Instructions Manual

Danger
Caution
Danger
Danger
12/126
Siemens Building Technologies
HVAC Products
The following terminals may carry dangerous voltages even when the variable speed
drive is not running:
– Power supply terminals L1, L2, L3.
– Motor terminals U, V, W.
– Link terminals DC-, DC+/B+, DC/R+, B-.
To prevent inductive and capacitive interference, connect the power, motor, and control
cables to the variable speed drive as illustrated and described in section 4.2.1 "EMC-
compatible wiring".

2.3 Operation

♦
SED2 variable speed drives operate at high voltages.
♦
Emergency stop facilities in accordance with EN 60204 IEC 204 (VDE 0113) must
remain operative in all operating modes of the control equipment. Resetting the
emergency stop facility may not cause an uncontrolled or undefined restart.
♦
In cases where faults in the control equipment could cause significant equipment
damage or severe physical injury (e.g., potentially dangerous short circuits), take
additional external precautions or provide facilities to ensure or enforce safe
operation even in the event of a short circuit (e.g., independent limit switches,
mechanical interlocks, etc.).
♦
Certain parameter settings can cause an automatic restart of the variable speed
drive following an fault or supply voltage failure, provided the fault has been
eliminated/acknowledged or the supply voltage has been restored.
♦
The variable speed drive is capable of protecting the motor from overload. (Motor
overload protection in accordance with UL 508C, section 42). See P0610 and
P0335.
♦
Protection against motor overload can be instituted via an external PTC thermistors
(temperature variable conductor) via a special input (Class 14/15, see also section
4.3.12, page 37).
♦
Do not use the variable speed drive as an "Emergency Stop" mechanism
(see EN60204, 9.2.5.4).

2.4 Repairs

♦
Only the Siemens service, repair centers authorized by Siemens, or authorized
personnel fully acquainted with all the warnings and operating procedures as
specified in this manual may repair this equipment.
♦
Replace defective parts or components using parts from the relevant spare parts
list.
Disconnect the power supply before opening the device.
SED2 variable speed drives
Safety instructions
CM1U5192en
01.2002