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Figure 14-29(A).—Heat pump schematic. | Up
Utilitiesman (Advanced) - Manual for electric, plumbing, water and other utilities | Next
Continuity Readings |
Voltage Readings
To begin, set your multimeter to voltage; ensure the power is on and all wires are connected
to the component being tested. The four important troubleshooting procedures that apply to
reading voltage are as follows:
1. Place the meter probes are on a path. If there is a voltage reading, the path is open.
·
Place one meter probe on the left side
of the CR contact and the other probe on the
left side of the HP switch.
If you obtain a voltage reading, this indicates
that either the path is open or the contacts
are open.
2. Place the meter probes on a path. If there is no-voltage reading, the path is closed.
·
Place one meter probe on the left side
of the CR contact and the other probe on the
left side of the HP switch. If you obtain no
voltage reading, the path is closed.
3. Place the meter probes across a load. If a voltage reading is obtained, the load is
recieving current. When the load is NOT operating, you should check for a grounded
winding and for winding resistance.
·
Place one meter probe on the right
side of the LLP switch and the other probe
on the left side of IT. If you obtain a
voltage reading, the compressor contactor is
energized and the compressor should be
running.
14-18(C)
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