Aprilaire 1850 - Troubleshoot Manual

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Aprilaire Dehumidifier Troubleshooting Manual
Models 1830, 1850, 1870
Table of Contents
Troubleshooting Diagnostic Codes .............................................................................................................. 2
E1 ..................................................................................................................................................... 2
E2, E3 ................................................................................................................................................ 3
E4……………………………………………………………………………………………………………………………………………….4
E5, E6 ................................................................................................................................................ 7
E7, E8 ................................................................................................................................................ 8
E9……………………………………………………………………………………………………………………………………………….9
Verifying Capacity....................................................................................................................................... 10
Water Leaks ................................................................................................................................................ 15
Fan Does Not Function ............................................................................................................................... 15
Circuit Breaker Trips ................................................................................................................................... 16
Defrost, E8, Noise……………………………………………………………………………………………………………………………..17
Parts Lists .................................................................................................................................................... 18
Electrical Schematics .................................................................................................................................. 22
Instruments you will need to complete troubleshooting:
1. Digital Multi-Meter (DMM) capability of measuring
• AC and DC voltage
• Resistance
• Capacitance
Minimum tools needed to complete troubleshooting:
1. Torx T20 and T25 screwdrivers or driver bits
2. Small (terminal) flat head screwdriver
3. Needle nose pliers
4. Level (to troubleshoot water leak claims)
WARNING: 120-volts can cause serious injury or death. Do not touch live, exposed 120-volt
wiring or wiring terminals.
Troubleshooting must be performed by a qualified HVAC service person trained to take the
proper safety precautions when performing service on 120-volt equipment.
!

Summary

Troubleshooting Diagnostic Codes

E1 - Internal %RH;Temperature Sensor Failure

Troubleshooting internal %RH/Temperature Sensor failures.

E2 - High Refrigeration Pressure

Troubleshooting high refrigeration pressure issues.

E3 - Model 76 Remote Control Communication Loss

Troubleshooting Model 76 remote control communication loss.

E4 - Insufficient Capacity

Troubleshooting insufficient dehumidifier capacity.

E5 or E6 - Temperature Thermistor Failure

Troubleshooting temperature thermistor failures.

E7 - Float Switch Open

Troubleshooting float switch open errors.

E8 - Inlet Air Temperature Out of Range

Troubleshooting inlet air temperature out of range.

E9 - Outdoor Temperature Sensor Failure

Troubleshooting outdoor temperature sensor failures.

Verifying Capacity

Water Leaks

Fan Does Not Function

Circuit Breaker Trips

Defrost, E8, Noise

Defrost

Information on the dehumidifier's defrost feature.

E8 - Temperature and Dew Point Protection

Explains E8 code related to temperature and dew point.

Noise

Troubleshooting and addressing noise issues.

1830;1850 Parts List

1850 F Parts List

1870 Parts List

1870 F Parts List

1830, 1850 W & 1870 W Wiring Diagrams

1850, 1850 F, 1870, 1870 F Wiring Diagrams

Aprilaire 1850 Specifications

General

Capacity	95 pints per day
Energy Star Certified	Yes
Built-in Humidity Sensor	Yes
Voltage	115V
Airflow	200 CFM
MERV Rating	MERV 8
Drain Size	3/4 inch NPT
Humidity Control Range	80% RH
Coverage Area	Up to 5, 200 sq ft