Mitsubishi Split System SUZ-AA24NLH-U1

Complete the following safety checks before starting work on the refrigerating system

Check the area with an appropriate refrigerant detector before starting work

Monitor the area continuously with a refrigerant detector during work

Leak Detection Equipment Verification

Is the leak detection equipment suitable for all applicable refrigerants?

Ensure the leak detection equipment is nonsparking, adequately sealed, or intrinsically safe

Ensure that contamination of different refrigerants does not occur when using charging equipment

Ensure that hoses or lines are as short as possible to minimize the amount of refrigerant contained in them

Keep cylinders in an appropriate position according to the instructions

Ensure that the refrigerating system is earthed prior to charging the system with refrigerant

Label the system when charging is complete (if not already)

Ensure extreme care is taken not to overfill the refrigerating system

Electrical Components Specification Check

Manufacturer's Guidelines Compliance

Consult Manufacturer's Technical Department

Ventilation Machinery and Outlets

Correct Illegible Markings and Signs

Refrigerating Pipe and Components Position

Ensure capacitors are discharged safely to avoid sparking.

Check that no live electrical components and wiring are exposed during operations.

Verify continuity of earth bonding.

Is there a fault that could compromise safety?

If a fault exists, has it been satisfactorily dealt with before connecting electrical supply?

If the fault cannot be corrected immediately, has an adequate temporary solution been implemented?

Review the TEST POINT DIAGRAM AND VOLTAGE

Identify the JS wire on the outdoor inverter P.C. board

Determine the current state of the JS Jumper

Adjust the JS wire to change the defrost finish temperature

Cut the JS wire if the desired temperature is 64°F (18°C)

Solder the JS wire if the desired temperature is 50°F (10°C)

Verify the defrost finish temperature adjustment