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SiUS091628EA
Silicone Grease on Power Transistor/Diode Bridge
Trial Operation and Field Settings
126
5. Silicone Grease on Power Transistor/Diode Bridge
Outline
Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when
you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power
transistor/diode bridge.
Details
1. Wipe off the old silicone grease completely.
2. Apply the silicone grease evenly. See the illustrations below for examples of application.
3. Tighten the screws of the power transistor/diode bridge.
4. Make sure that the heat radiation parts are firmly contacted to the radiation fin.
Note: Smoke emission may be caused by bad heat radiation when the silicone grease is not
appropriately applied.
OK: Evenly applied
NG: Not evenly applied
NG: Foreign matter is stuck.
(R22541)
Power transistor
(or diode bridge)
Silicone grease
Radiation
fin
PCB
(R21866)
Foreign matter
(R21867)
Summary of Contents for FFQ09Q2VJUFFQ12Q2VJUFFQ15Q2VJUFFQ18Q2VJURX09QMVJURX12QMVJURX15QMVJURX18QMVJU
Page 12: ...SiUS091628EA 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiUS091628EA 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 120: ...Check SiUS091628EA 109 Service Diagnosis 15 18 class R20701 1 2 3 4 Multimeter...
Page 122: ...Check SiUS091628EA 111 Service Diagnosis 15 18 class R20704 W V U DC_P1 DC_N1...