Mr4 Time Clock Program Settings; Programming The Control; Using The Control Module - Emerson Liebert GXT3 User Manual

programming the Control

Use this section to program the control module. After
programming, the control module reatins its programmed
settings, even in the event of power failure or power
down.

Using the Control Module

During normal operation, the display shows the main
sensor temperature. See Figure .
• Press Up or Down repeatedly to scroll through
the main sensor temperature, evaporator sensor
temperature and the binary input status.
• Press Enter to display the setpoint.
After 15 seconds of inactivity, the display returns to main
sensor temperature.
Unlocking or Locking Access to programming
1. In sequence, press and hold Enter, Up, and
then Down.
. Hold These buttons until "---" displays.
3. Continue holding until the main sensor
temperature displays (approximately 10
seconds).
Changing the setpoint
1. Press and hold Enter for approximately 3
seconds.
. Release Enter when the new Setpoint value
displays.
3. Press Up or Down to display the new
Setpoint value.
4. Press Enter to save the new setting.
note: The control ignores changes and reverts to the previous
saved value unless you press enter.
Changing Other Function values
1. Press and hold Enter until XY (the code for
Differential) appears (about 10 seconds). See
Table 3.
. Press Up or Down until the desired function
appears. See Table 3 and Control Functions.

MR4 Time Clock program Settings

note:
Initiating a manual Self-Test
IMpORTAnT: Disconnect controlled loads before
running the self-test procedure. Reconnect
controlled loads and cycle power to resume normal
operation.
Initiating a Manual Defrost Cycle
note:
Initiating a Manual Deep Freeze Cycle
4
3. Press Enter. The function's existing value
appears.
4. Press Up or Down until the desired setting
value appears.
5. Press Enter to save the new value. After 0
seconds of inactivity, the display returns to normal
operation.
The control ignores changes and reverts to the previous
saved value unless you press enter.
1. In sequence, press and hold Up and then
Down.
. Hold for 5 seconds.
Press and hold Defrost for 3 seconds to interrupt
normal control operation and initiate a manual
defrost cycle.
If the Defrost evaporator Temperature is higher than the
Defrost Termination Temperature, the control does not
initiate a manual defrost.
1. In sequence, press and hold Enter and Up.
. Hold both buttons for 5 seconds.
3. The compressor status LED lights and the
compressor output relay contacts close.
IGIC-CIDM-0909