Samsung AR12HSSDPWKNEE, Service Manual

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10-38 Samsung Electronics
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New Function [ Indoor Terminal Block Safety Device ]
1. Thermal Fuse is installed in Terminal Block as below.
(Thermal Fuse is used to prevent PL caused b y a defective connection of indoor and outdoor units)
T hermal Fu se
Terminal Block Internals
Connection of terminal block
and Main PBA
2. Thermal Fuse is opened when internal temperature of Terminal Block goes to a certain point due to Tracking caused by
a defective connection of indoor and outdoor units.
- When Thermal Fuse is opened, Main PBA (DC12V) is turned off and the indoor unit does not operate.
(There is no problem with Main PBA in this case)
- In the above case, the change of all-in-one Terminal Block will make Main PBA operate again.
Circuit Block
3. Measurement method of fair/defective thermal fuse
Fail Defective