The Daikin Indoor Cooling/Heating Unit FXUQ24PVJU is a versatile HVAC solution designed for efficient climate control in residential and commercial spaces. This unit offers reliable heating and cooling performance, ensuring comfort throughout the year while maintaining energy efficiency.

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Manual for Daikin Indoor Cooling/Heating Unit FXUQ24PVJU

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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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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 FXUQ24PVJU

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Maintenance Plans for Daikin Indoor Cooling/Heating Unit Model FXUQ24PVJU

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Superheat Operation Check

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

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

Judgement criteria of superheat operation:

Suction gas superheated degree

Discharge gas superheated degree

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?

Additional notes on the superheat operation check

Sign off on the superheat operation check

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Pressure Check

Warning: This procedure requires trained personnel with PPE!

Compressor PI control in cooling

Low pressure protection control

Hot gas bypass control

Superheated degree control in cooling

Superheated degree control in heating

Enter the low pressure reading

Enter the high pressure reading

Sign off on the pressure check

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Heat Recovery System Maintenance

Check for High Pressure in cooling, is the outdoor unit electronic expansion valve (main) fully open?

Check for High Pressure in heating, is the indoor unit electronic expansion valve used for “subcooled degree control”?

Check Thermistor

Check Pressure Sensor

Check for broken wire of the relay wire

Procedure for checking outdoor-outdoor unit transmission wiring for broken wires: Is there continuity between the transmission wiring terminal blocks F1 and F2 of the central remote controller?

Procedure for checking indoor-outdoor unit transmission wiring for broken wires: Is there continuity between the transmission wirings F1 and F2 of the 'Indoor Unit a' that is farthest from the 'Outdoor Unit C'?

Check Fan Motor Connector (Power Supply Cable): Is the resistance between phases of U, V, W at the motor side connectors balanced and there is no short circuiting?

Check Fan Motor Connector (Signal Cable): Is the resistance between Vcc and each phase of U, V, W, and GND and each phase at the motor side connectors balanced within the range of ± 20 %?

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Electronic Expansion Valve Coil Check

Remove the connector for electronic expansion valve (X7A) from PCB

Measure the resistance value between White and Yellow pins

No continuity between White and Yellow

Measure the resistance value between White and Orange pins

Resistance value between White and Orange is approx. 300 Ω

Measure the resistance value between White and Red pins

Resistance value between White and Red is approx. 150 Ω

Measure the resistance value between Yellow and Blue pins

Resistance value between Yellow and Blue is approx. 300 Ω

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