Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW User Manual
System Maintenance
Liebert
®
MC
™
54
Verify the Fan Address
Verify that each fan has a unique address by:
1. Use the Up or Down arrow until C-- is on the display.
2. Press the ENT button.
3. In the Manual/System Control Selection parameter use the Up or Down arrow until C24 is on the
1. Use the Up or Down arrow until C-- is on the display.
2. Press the ENT button.
3. In the Manual/System Control Selection parameter use the Up or Down arrow until C24 is on the
display.
4. In the Manual Control configuration parameter press ENT button.
5. Use the Up or Down arrow to select 0.
6. Press the ENT button. The display will read 888 if the command was accepted.
7. Press the ESC button for C24 to show on the display.
8. Use the Up or Down arrow until C34 is on the display.
9. Press ENT button.
10. If Fan 1 is currently running, the fans speed should be displayed in terms of percentage of full
5. Use the Up or Down arrow to select 0.
6. Press the ENT button. The display will read 888 if the command was accepted.
7. Press the ESC button for C24 to show on the display.
8. Use the Up or Down arrow until C34 is on the display.
9. Press ENT button.
10. If Fan 1 is currently running, the fans speed should be displayed in terms of percentage of full
speed. If Fan 1 is not running, 0.00 should be displayed.
11. Use the Up or Down arrow to enter 100% speed.
12. Press the ENT button. The display will read 888 if the command was accepted.
13. Fan 1 should speed up to 100% and all the other fans should stay the same.
14. If Fan 1 is not running or any of the other fans also speed up to 100%, the fan-addressing
12. Press the ENT button. The display will read 888 if the command was accepted.
13. Fan 1 should speed up to 100% and all the other fans should stay the same.
14. If Fan 1 is not running or any of the other fans also speed up to 100%, the fan-addressing
procedure (Steps 19 through 25) must be repeated.
15. Press the ESC button for the parameter to be shown on the display.
16. Repeat Steps 4 through 9 for the rest of the fans, if present.
16. Repeat Steps 4 through 9 for the rest of the fans, if present.
• C35: for Fan 2.
• C36:. for Fan 3.
• C37: for Fan 4.
• C36:. for Fan 3.
• C37: for Fan 4.
17. All fans should be at 100% speed.
18. 5Use the Up or Down arrow until C24 is on the display.
19. Press the ENT button.
20. In the System Control configuration parameter, use the Up or Down arrow to select 1.
21. Press the ENT button. The display will flash 888 if the command was accepted.
22. Press the ESC button for C24 to be shown on the display.
23. All fans should return to a normal speed based on the pressure input and the state of indoor unit’s
18. 5Use the Up or Down arrow until C24 is on the display.
19. Press the ENT button.
20. In the System Control configuration parameter, use the Up or Down arrow to select 1.
21. Press the ENT button. The display will flash 888 if the command was accepted.
22. Press the ESC button for C24 to be shown on the display.
23. All fans should return to a normal speed based on the pressure input and the state of indoor unit’s
compressor.
PCB Notes
• J4 and J6 are the CANbus termination jumpers. If the condenser is the last device in the CANbus
communication line, the jumper must be placed between pins 1 and 2 of J6, and between pins 2
and 3 on J4. If the condenser is not the last device in the CANbus communication line, then both
jumpers on J4 and J6 must be placed on Pins 2 and 3. If the jumpers are not in the correct
positions, CANbus communication errors may occur.
• A jumper must be present at J2. If no jumper is present, the control board will not boot properly
during power startup