The Daikin Indoor Cooling/Heating Unit FXMQ09PBVJU is a versatile HVAC solution designed for efficient climate control in residential and commercial spaces. This unit offers reliable heating and cooling performance, ensuring optimal comfort throughout the year. With advanced technology and energy-efficient features, it is an ideal choice for modern indoor environments.

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Manual for Daikin Indoor Cooling/Heating Unit FXMQ09PBVJU

MAINTENANCE RESOURCES

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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
+ 13 more

Work Order Templates

Pre-built workflows to keep your asset running smoothly.

Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Daikin Indoor Cooling/Heating Unit FXMQ09PBVJU

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Maintenance Plans for Daikin Indoor Cooling/Heating Unit Model FXMQ09PBVJU

Integrate maintenance plans directly into your work orders in MaintainX.

Power Transistor Check

Warning: Ensure power is OFF before starting the procedure

Power OFF

All wiring removed from the PCB

Type of multimeter prepared

Power supply turned OFF

Wait for 10 minutes before proceeding

10 minutes have passed

Measurement mode for analog multimeter

Measurement in diode check mode for digital multimeter

Run this procedure

Pressure Check

Details of compressor capacity control while in cooling, refer to Compressor PI control

The low pressure protection control includes low pressure protection control and hot gas bypass control

In cooling, the indoor unit electronic expansion valve is used for superheated degree control

In heating, the outdoor unit electronic expansion valve is used for superheated degree control of outdoor unit heat exchanger

Enter the low pressure reading

Enter the high pressure reading

Did the system pass the pressure check?

Sign off on the pressure check

Run this procedure

Refrigerant Check

Refrigerant Overcharge Check

High pressure reading

Overload control conducted?

Superheated degree of suction gas

Discharge pipe temperature

Subcooled degree of condensate

Temperature of discharge air through the subcooled section is lower?

Refrigerant Shortage Check

Superheated degree of suction gas

Run this procedure

Heat Recovery System Vacuuming/Dehydration Maintenance

Normal vacuuming and dehydration

Vacuum pump connected to service ports of liquid pipe and gas pipe

Enter the vacuum level after 2 hours of vacuuming

Did the vacuum level reach –100.7 kPa (–14.6 psi) or less?

Enter the vacuum level after additional 1 hour of vacuuming if needed

Did the vacuum level reach –100.7 kPa (–14.6 psi) or less after additional vacuuming?

Leak tests conducted if needed

Compressor left at the degree of vacuum of –100.7 kPa (–14.6 psi) or less for a period of 1 hour or more

Did the vacuum gauge reading rise?

Run this procedure

Superheat Operation Check

Superheating temperature control in cooling is conducted by indoor unit electronic expansion valve

Enter the superheating temperature in cooling

Superheating temperature control in heating is conducted by outdoor unit electronic expansion valve (main)

Enter the superheating temperature in heating

Judgement criteria of superheat operation: Suction gas superheated degree: 10°C (50°F) and over. Discharge gas superheated degree: 45°C (113°F) and over, except immediately after compressor starts up or is running under drooping control

Is the suction gas superheated degree 10°C (50°F) and over?

Is the discharge gas superheated degree 45°C (113°F) and over, except immediately after compressor starts up or is running under drooping control?

Sign off on the superheat operation check

Run this procedure