Circuit Breaker Trips - Aprilaire 1830 Troubleshooting Manual

5. Turn the ON/OFF toggle switch to ON and the control to ON; the fan should start right away with
the display showing "AIR SAMPLING". Measure the AC voltage at the fan terminals on the
Internal Control board. Use caution as this is line voltage.
If the FAN LED on the Internal Control board is lit and there is 120 VAC at the fan
•
terminals, disconnect the fan run capacitor and measure the capacitance – this should
be 8 µF (microfarad) ±5% for 1830 with Serial Numbers before 112015A09596, 6 µF
(microfarad) ±5% for 1830 with Serial Number 112015A09596 or later, 12 µF ±5% for
the 1850, 10 µF ±5% for the 1870, 8 µF ±5% for the 1870F. If the capacitor is bad,
replace it (5459 70pt before 112015A09596 / 5582 70pt 112015A09596 or later / 5468
95pt / 5573 1870 / 5459 1870F), if the capacitor is good then replace the fan (5453 70pt
/ 5467 95pt / 5572 1870 / 5588 1870F).
• If the FAN LED on the Internal Control board is lit and there is 0 VAC, the Internal
Control board will need to be replaced (5444).
• If the FAN LED on the Internal Control board is not lit and the display shows "AIR
SAMPLING", the User Interface Assembly will need to be replaced (5445).

Circuit Breaker Trips

All 1800 series must be plugged into an outlet served by a 15 amp circuit breaker. The 1850 & 1870
dehumidifiers use approximately 8 amps at high load (i.e. hot and humid) conditions and less at low load
conditions. The 1830 dehumidifier uses approximately 6 amps at high load and less at low load.
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 toggle switch OFF, unplug the dehumidifier, and remove the side panel from
the dehumidifier.
2. Inspect the electrical connections at the power switch, Internal Control board and run
capacitors.
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Fan Capacitor