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SiUS041501E
Silicon Grease on Power Transistor / Diode Bridge
Trial Operation and Field Settings
108
4. Silicon Grease on Power Transistor / Diode Bridge
Outline
Apply the specified silicon grease to the heat radiation part of a power transistor / diode bridge when
you replace an outdoor unit PCB. The silicon grease encourages the heat radiation of a power
transistor / diode bridge.
Detail
1. Wipe off the old silicon grease completely.
2. Apply the silicon 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 silicon grease is not
appropriately applied.
OK: Evenly applied
NG: Not evenly applied
NG: Foreign matter is stuck.
(R21865)
Power transistor
(or diode bridge)
Silicon grease
Radiation
fin
PCB
(R21866)
Foreign matter
(R21867)
Summary of Contents for FTKN09NMVJU
Page 12: ...SiUS041501E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 59: ...SiUS041501E Remote Controller 48 Part 5 Remote Controller 1 Cooling Only 49 2 Heat Pump 51...
Page 65: ...SiUS041501E Service Diagnosis 54 5 13 Power Module Check 100...
Page 132: ...Revision History Month Year Version Revised contents 03 2015 SiUS041501E First edition...