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Installation Manual
12.4 Testing / Changing a Triac
A failed triac might cause overheating or irregular heating or no heating at all. If all
other troubleshooting steps mentioned above do not reveal the problem, follow
below instructions to test the triacs.
WARNING: ELECTRICAL HAZARD
Failure to disconnect the power from the water heater
before attempting to install or repair it will result in property
damage, severe personal injury, or death.
1. Shut off the power supply to the water heater.
2. Remove the front cover per the instructions in Section 11.1 or damage may
occur.
3. Remove the three screws holding the internal protective cover.
Figure 34
4. Locate the triacs
Figure 35
3 2 |
To Test Triac:
1. Measure resistance (Ω) across terminals as shown below
Figure 36
Test Points
A1 to A2
G to A1
Table 10
To Change Triac:
1. Ensure the power supply is turned off .
2. Take a phote of triac wiring for reinstallation. Disconnect the three (3) wire
1
Figure 37
Bosch Tronic 6100 C Electric Tankless Water Heaters - BTC 724001301 A (08.2022)
A2
connectors on the triac. Remove the wires.
G
A1
Proper Reading
Open Circuit
Continuity
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