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Others
Si12-619A
358
Others
1.3
Application of
Silicon Grease
to a
Power Transistor
and
a
Diode Bridge
Applicable
Models
All outdoor units using inverter type compressor for room air conditioner.
When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease
(*1) is certainly applied to the heat radiation part (the contact point to the heat radiation fin) of
the power transistor and diode bridge.
*1: Parts number of the silicon grease – 1172698 (Drawing number 3FB03758-1)
Details
The silicon grease is an essential article for encouraging the heat radiation of the power
transistor and the diode bridge. Applying the paste should be implemented in accordance with
the following instruction.
Remark: There is the possibility of failure with smoke in case of bad heat radiation.
To completely wipe off the old silicon grease on a heat radiation fin.
To evenly apply the silicon grease to the whole.
Do not have any foreign object such as solder or paper waste between the power transistor,
the diode bridge and the heat radiation fin.
To firmly tighten the screws of the power transistor and the diode bridge, and to surely
contact to the heat radiation fin without any gap.
<Example>
Take out a PCB
Diode bridge
(Diode bridge, Rectifier stack, etc.)
Power transistor
(TRM, TPM, IGBT, IPM, SPM, etc.)
Not applied.
Paper wastage
OK : Evenly applied
silicon grease.
NG : Not evenly
applied
NG : Foreign object.
(R7100)
Summary of Contents for 3MKS50DVM
Page 13: ...Introduction Si12 619A xii ...
Page 131: ...Control Specification Si12 619A 118 Function and Control ...
Page 213: ...Instruction Si12 619A 200 Operation Manual ...
Page 283: ...Check Si12 619A 270 Service Diagnosis ...
Page 302: ...Si12 619A Outdoor Unit E Series 50 52 58 Class Removal Procedure 289 Step Procedure Points ...
Page 385: ...Wiring Diagrams Si12 619A 372 Appendix FTK X S50 60 71FVLT ...
Page 399: ...Si12 619A vi Index ...