Emerson EV3 Series - Shutdown Conditions; Compressor Speed Range Selection; Onboard 7-Segment Display

AGL_Sol_EV3_E_Rev_02 19
Based on the compressor envelope and the speed range selection (see paragraph 5.2.7
"Compressor speed range selection") it can happen that low speed demands will be ignored.
5.2.6 Shutdown conditions
The drive will stop in heating as well as in running mode if one of below conditions occurs:
▪ system or drive fault is detected;
▪ enable signal is gone;
▪ analog signal gets lower than 0.5 V.
5.2.7 Compressor speed range selection
With a bridge on terminal L (CN104) the full application envelope speed range is usable in normal
operation. In this case the main controller must have a proper envelope control implemented. Without
this bridge, the drive will limit the lowest speed to MMS.
Figure 11: Analog board speed range selection
In speed-drop-protection mode the drive will only use the limited speed range. In this case the speed
will not go below the MMS speed.
5.2.8 Onboard 7-segment display
The onboard 7-segment display shows the main information about the drive compressor status,
failure and warning codes which are part of Table 19.
Board state
Description
Power on
(5 seconds)
Alternating between selected drive
compressor code (ie, C023) and
software version (ie, S04.8)
Standby
Alternating between IDLE and
software version
Stator
heating
Shows the selected power in %
between 0 and 100 % (H-00, H100)
Speed
control
The display shows the compressor
speed in rpm
Speed-drop
protection
Alternating between the compressor
speed and the root cause (ie, Sd06)
shown in Table 19.
Fault state
Displaying the fault code described
in Table 19.
Table 17: Analog board status display