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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 FXTQ54PAVJU

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Maintenance Plans for Daikin Indoor Cooling/Heating Unit Model FXTQ54PAVJU

Integrate maintenance plans directly into your work orders in MaintainX.

Power Transistor Check

Power OFF

All wiring removed from the PCB where power transistors are mounted on

Type of multimeter prepared

Power supply turned OFF and 10 minutes or more have passed before resistance measurement

If using analog type of multimeter, measurement made in resistance measurement mode in the x1 kΩ range

If using digital type of multimeter, measurement made in diode check mode

Sign off on the power transistor check

Run this procedure

Electronic Expansion Valve Coil Check

Warning: This procedure requires trained personnel with PPE!

Electronic Expansion Valve Coil Check

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

Measure the resistance value between pins

No continuity between White and Yellow

Resistance value between White and Orange

Resistance value between White and Orange is approx. 300 Ω

Resistance value between White and Red

Resistance value between White and Red is approx. 150 Ω

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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

Sign off on the pressure check

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Heat Recovery System Vacuuming/Dehydration Maintenance

Normal vacuuming and dehydration

Vacuum pump that enables vacuuming down to –100.7 kPa (–14.6 psi) is used

Enter the vacuum pump run time in hours

Degree of vacuum reached –100.7 kPa (–14.6 psi) or less

Leak tests conducted if vacuum does not reach –100.7 kPa (–14.6 psi) or less after 3 hours

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

Necessary amount of refrigerant charged

Special vacuuming and dehydration - In case of moisture may get mixed in the piping

Followed the same procedure as that for 1) Normal vacuuming and dehydration

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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?

Enter any additional observations

Sign off on the superheat operation check

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