Mitsubishi Split System SUZ-AA36NL-U1

Is the outside temperature 68°F (20°C) or below?

Activate pre-heat control by cutting the JK wire of the inverter P.C. board

Refer to '11-6. TEST POINT DIAGRAM AND VOLTAGE' for guidance

Inverter P.C. Board Replacement

Check the Jumper wires on the inverter P.C. board

Cut/solder Jumper wires if necessary

Ensure electrical components are fit for purpose and correct specification

Follow manufacturer's maintenance and service guidelines

Consult manufacturer's technical department if in doubt

Checks for installations using FLAMMABLE REFRIGERANTS

Verify refrigerant charge is appropriate for room size

Check ventilation machinery and outlets for adequate operation and obstructions

Ensure equipment markings are visible and legible

Correct any illegible markings and signs

Inspect refrigerating pipes or components for potential exposure to corrosive substances

Ensure no potential sources of ignition are present

Confirm that electronic leak detector is not a potential source of ignition

Verify detector calibration in a refrigerant-free area

Set leak detection equipment to appropriate percentage of LFL

Confirm calibration to the refrigerant employed

Check for refrigerant leaks using electronic leak detectors

Use leak detection fluids, avoiding detergents containing chlorine

Select the function from the table

Use the remote controller to set the unit function

Confirm the function setting on the remote controller display

Ensure all safety equipment is in place and operational

Verify that the refrigerant detector is appropriate for the refrigerant type

Check that the leak detection equipment is nonsparking and adequately sealed

Check the area with a refrigerant detector before starting work

Monitor the area continuously with a refrigerant detector during work

Confirm that no toxic or flammable atmospheres are present