Electrical Diagnostic Points; Key Points When Troubleshooting Electrical Values - Rinnai Sensei N-Series Service Presentation

Electrical Diagnostic Points

Verifying electrical values of individual components must be conducted correctly and safely. Verifying incoming
supply voltage is the most common metering needed in the field—especially during installation.
1. Ensure volt meter probes are solidly contacting metal
2. Apply probes to the back of electrical connections where wires enter electrical connector to prevent possible
damage to plugs.
3. Know your meter and how to set it for each type of measurement. Always set meter to next highest value
from range listed in troubleshooting sheets.
Ω = Ohms or resistance
VAC or V~ = AC voltage
4. When measuring resistance, ensure the component is disconnected from the circuit board AND the power supply
has been turned OFF.
5. When measuring a solenoid's resistance, place the meter probes on the solenoid's lugs (connection points)
with the wires disconnected from solenoid.
6. A correct resistance reading from a solenoid or transformer coil is not a guarantee that the component is
good, as the windings can open under load. An incorrect value is a very good indication that the component
is bad though.
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PROPRIETARY and CONFIDENTIAL

Key points when troubleshooting electrical values:

K = X1000/ ex. 6K Ω = 6000 Ohms
VDC or V- = DC voltage
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