Bosch SM Split CS Series Installation, Operation And Maintenance Manual page 25

SM Split CS Series Heat Pump
Fig. 13 SmartStart Assist Modes of Operations (Overcurrent Condition and Incomplete Ramp Alarm)
SmartStart Assist Modes of Operation Notes
1. The SmartStart Assist has two indication LEDs
on board. The green LED indicates the status
of the on-board power supply while the red
LED indicates an alarm condition or the
recovery time between starts.
2. Once the main voltage is present, the green
LED will be fully ON. In case the main voltage is
less than the stated pickup voltage alarm value,
the green LED will be flashing. In case main
voltage is higher than the stated pick-up
voltage and green LED is flashing, then this
may indicate that the on-board power supply is
faulty. (Power Supply Alarm)
3. Upon closing L/L1, the SmartStart Assist will
start ramping, duration of which is < 1 second,
provided that the minimum time from stop to
start is respected. When opening L/L1, the
SmartStart Assist will stop without any ramp
down.
SM Split CS Series Heat Pump
4. In the case of an under voltage, the SmartStart
Assist will shut down and the red LED flashes
two times as long as the under voltage is
present. Once the main voltage is restored the
red LED will continue flashing for five minutes.
Following these five minutes (six minutes for
HP versions), the SmartStart Assist will start
ramping function in the case L/L1 is closed.
The device can be reset at any time by
removing power on L2/N connection. When the
power is reapplied, the soft starter will star
ramping up as soon as L/L1 is closed, provided
that the minimum time from stop to start are
respected.
5. If an over current (>80A for 1 sec.) is sensed,
the SmartStart Assist will shut down and the
red LED will flash three times indicating an
over current situation. This continues for five
minutes. In the case that the over current is
still present at the second attempt, user
intervention is required to reset the controller
by cycling power for the device to operate
again as this implies that there are problems in
the system.
Subject to change without prior notice
Field-Installed Accessories | 25
8733825873 (2020/05)