Function; Forced Cooling Operation; Setting Procedure - Friedrich MR24UY3J Manuel D'installation

Function

Function

Forced Cooling Operation

• Adding the refrigerant in winter.

Setting Procedure

1) Set the Dip Switch as follow after shutting the power source down.
MR24UY3J
2) Reset the power.
3) Red LED and Green LED of PCB lights during work.
(The indoor unit is operated by force.)
4) If operation is done, Red LED will be turned off.
If operation is not done normally, Red LED will blink.
5) Close the Liquid valve only after green LED turned off (7 minutes from the start of the machine).
Then close the gas valve after Green LED on.
WARNING:
• When the green LED of PCB is on, compressor is going to be off because of low
pressure.
• You should return the Dip Switch to operate normally after finishing the operation.
• Improper Pump down will lead to product turn off along with LED (green &red) off
with in 20 minutes from the initial start.
Pump Down Dip S/W Setting
(Red LED On, Green LED Off)
(Red LED On, Green LED On)
(Red LED On, Green LED Off)
Pump Down Complete
(Red LED Off, Green LED On)
(Red LED Off, Green LED On)
20 Air Conditioner
Power on
Comp on
Pump Down Start
Power off
6
MR36UY3J
Liquid Valve Closed
Gas Valve Closed