Complete
Purpose To provide service technicians with a detailed understanding of: How inverter control operates within 3-phase Fujitsu systems. The functions ...
Tue, 11 Nov, 2025 at 9:39 PM
Purpose To explain the operating principles, control systems, and service functions of DC fan motors used in Fujitsu air conditioning systems. This module ...
Tue, 11 Nov, 2025 at 9:43 PM
Purpose To verify the accuracy and operation of thermistors installed in Fujitsu outdoor units by checking their resistance values against standard refe...
Tue, 11 Nov, 2025 at 9:46 PM
Description Thermistors are critical temperature sensors used to monitor operating conditions throughout Fujitsu systems, including room air, refrigerant c...
Tue, 11 Nov, 2025 at 9:49 PM
Description Electronic Expansion Valves (EEVs) regulate refrigerant flow through the system by using a stepper motor controlled via precise voltage pulses....
Tue, 11 Nov, 2025 at 9:52 PM
Description The pressure transducer sensor is a critical input component used to monitor the refrigerant system pressure in both heating and cooling modes....
Tue, 11 Nov, 2025 at 9:55 PM
Description The Active Filter Module (ACTPM), also referred to as the Active PFC / IPM Module, is responsible for maintaining efficient power factor correc...
Tue, 11 Nov, 2025 at 10:00 PM
Overview FAN Mode operation is now available on certain VRF indoor units. This functionality was added following a software update that introduced inverse ...
Tue, 11 Nov, 2025 at 10:04 PM
Overview The Intelligent Power Module (IPM) — also referred to as the TR PCB — is a key inverter board component responsible for switching and driving the ...
Tue, 11 Nov, 2025 at 11:15 PM
Overview The Bridge Rectifier (or Diode Module) converts AC input voltage to DC voltage to supply power to the inverter circuit. This test confirms diode i...
Tue, 11 Nov, 2025 at 11:25 PM