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ESIE06-03
Additional Checks for Troubleshooting
3–61
3
3
4
5
1
5.12
Power Transistor Check
Check No.13
P
Checking the power transistor
P
Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
P
If unavoidably necessary to touch a live part, make sure the power transistor's supply voltage
is below 50 V using the tester.
P
For the UVW, make measurements at the Faston terminal on the board or the relay connector.
Tester's negative terminal
Power
transistor (+)
UVW
Power
transistor (–)
UVW
Tester's positive terminal
UVW
Power
transistor (+)
UVW
Power
transistor (–)
Normal resistance
Several k
Ω
to several M
Ω
Abnormal resistance
0 or
∞
W
V
U
Summary of Contents for Altherma EKHBH Series
Page 2: ...ESIE06 03 1 2 Part 1 System Outline 3 1 1 5 ...
Page 26: ...Functional Diagrams ESIE06 03 1 26 Part 1 System Outline 3 1 1 4 5 ...
Page 32: ...Piping Diagrams ESIE06 03 1 32 Part 1 System Outline 3 1 1 4 5 ...
Page 38: ...Switch Box Layout ESIE06 03 1 38 Part 1 System Outline 3 1 1 4 5 ...
Page 58: ...PCB Layout ESIE06 03 1 58 Part 1 System Outline 3 1 1 4 5 ...
Page 60: ...ESIE06 03 2 2 Part 2 Functional Description 3 1 2 5 ...
Page 68: ...Hydro box Functional Concept ESIE06 03 2 10 Part 2 Functional Description 3 1 2 4 5 ...
Page 88: ...ESIE06 03 3 2 Part 3 Troubleshooting 3 1 3 5 ...
Page 134: ...Error Codes System Malfunctions ESIE06 03 3 48 Part 3 Troubleshooting 3 1 3 4 5 ...
Page 152: ...Additional Checks for Troubleshooting ESIE06 03 3 66 Part 3 Troubleshooting 3 1 3 4 5 ...
Page 154: ...ESIE06 03 5 2 Part 5 Disassembly and Maintenance 3 1 5 ...