Servicing
AIRSTAGE Technical Reference Active Filter Module (ACTPM) Resistance Testing Power-off resistance checks for Active PFC / IPM modules The Active Filt...
Wed, 5 Aug, 2026 at 1:59 PM
Technical Service Reference Intelligent Power Module Testing IPM / TR PCB diode-test procedure and diagnostic interpretation For qualified technicians...
Wed, 5 Aug, 2026 at 1:41 PM
AIRSTAGE Technical Reference Bridge Rectifier Testing Diode-mode and live-voltage checks for single-phase and three-phase systems Use this procedure t...
Wed, 5 Aug, 2026 at 1:42 PM
Technical Service Reference DC Brushless Fan Motor Testing Electrical integrity, mechanical inspection and feedback verification Use this procedure to a...
Wed, 5 Aug, 2026 at 1:43 PM
General Assist Technical Reference Compressor Resistance and Insulation Testing Winding balance, insulation integrity and inverter compressor speed che...
Wed, 5 Aug, 2026 at 1:45 PM
AIRSTAGE Technical Reference 3-Wire Remote Signal Test Power-supply and communication checks for Y1, Y2 and Y3 remote-controller circuits For wall-mou...
Wed, 5 Aug, 2026 at 1:45 PM
System Signal Test Indoor and outdoor unit communication diagnostic procedure Overview The System Signal Test verifies serial communication between th...
Wed, 5 Aug, 2026 at 1:45 PM
General Assist Technical Reference AIRSTAGE Service Monitor Tool UTY-ASSXZ1 Setup, connection, monitoring, recording and data analysis guide For compa...
Wed, 29 Jul, 2026 at 3:04 PM
AIRSTAGE Technical Reference Enabling FAN Mode on Compatible VRF Indoor Units Function setting 99 for independent indoor fan operation Applicable only...
Wed, 5 Aug, 2026 at 2:00 PM
AOTH36KBTA5 - Noisy Compressor Flow Chart Troubleshooting flow for abnormal outdoor unit compressor noise, based on field findings and successful rectifi...
Tue, 7 Jul, 2026 at 1:17 PM