Emerson Liebert iCOM, Manual

Page: 136 / 172

Service Menu Parameters
Liebert
®
iCOM
®
for Liebert DSE
™
128
Figure 104 Diagnostics/service mode screen, page 4 of 8
S335 Alarm Relay —Activates the Liebert iCOM’s common alarm relay output.
S336 K11 Relay —Activates the Liebert iCOM’s free-cooling relay output.
S337 3P 1/2 Actuator Open —Energizes the open circuit of the 3P type chilled or free-cooling control
valve. The 3P valve is easily identified because it will be controlled from P22 of the main board. Both
values must be programmed On for the valve to modulate open. In addition, both values must be set
to Off on 3P 1/2 Actuator Close before the open command will take effect.
S338 3P 1/2 Actuator Close —Energizes the close circuit of the 3P type chilled or free-cooling control
valve. The 3P valve is easily identified because it will be controlled from P22 of the main board. Both
values must be programmed On for the valve to modulate closed. In addition, both values must be set
to Off on 3P 1/2 Actuator Open before the close command will take effect.
S339 BV Control —Activates the following two items allowing the motorized ball valve to be
manually opened or shut.
S340 MBV Position —Specifies the percentage that Valve 1 should be open. Range is 0 to 100%.
S341-344 Analog Out 1, 2, 3 & 4 —Specifies the analog output percentage subsequently controlling
the device connected to that output. Range is 0 to 100% but also depends on the output’s assignment
in factory settings.
An Analog Output will may be used for internal purposes or for signaling values for the customer. The
control for the Analog Output can be found in the Advanced - Factory Setting starting on page 7. Only
factory-trained personnel may make changes in the Advanced Menu.
NOTE
When the ball valve control is set to Auto, the motorized ball valve position will be adjusted to
the set value, but the pressure control algorithm will immediately begin adjusting the valve to
control the condenser pressure. When the ball valve control is set to Manual, the motorized ball
valve position will be maintained as set. Emerson recommends against manually setting the
motorized ball valve’s during compressor operation because it might cause the compressor to
trip on its high- or low-pressure protection controls.