Circuit Breaker Trips - Aprilaire 1710A Troubleshooting Manual

Use a small piece of solid (not stranded) wire, a paper clip or the leads of an ammeter to
touch together pads 4 and 6 on the ribbon cable.

If the fan turns on the control board will need to be replaced.

If the fan does not turn on, the power board will need to be replaced.

Circuit Breaker Trips

The 1710A and 1750A must be plugged into an outlet served by a 15 amp circuit breaker; the
dehumidifier uses approximately 8 amps at high load (i.e. hot and humid) conditions and less at low load
conditions.
The 1770A must be plugged into a 20 amp outlet and be served by a 20 amp circuit breaker; the
dehumidifier uses approximately 14 amps at high load (i.e. hot and humid) conditions and less at low
load conditions.
If there are other electrical components that draw a lot of current connected to the same circuit
breaker, the circuit may be overloaded and a new circuit should be run to serve the dehumidifier.
Consult with a qualified electrical contractor if there are questions as to the suitability of the circuit into
which the dehumidifier is plugged.
If the electrical service is sound, there are two primary reasons why a circuit breaker would trip: a wire
has disconnected or the compressor run capacitor is faulty.
1. Turn the ON/OFF switch OFF and remove the front panel from the dehumidifier.
2. Inspect the electrical connections at the power switch, power board, contactor (Model 1770A
only) and run capacitor.
3. If none of the wires have been disconnected, remove the wires connected to the run capacitor.
4. Measure the capacitance of the run capacitor:

Model 1710A/1750A – 55 microfarad ± 5%

Model 1770A – 60 microfarad ± 5%
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