FOR HVAC INSTALLER ONLY
Unit not providing ventilation. Ventilation timer not operating correctly.
1.If timer is not functioning correctly reset timer and reprogram.
2.Check control wire connections (check connections at fresh air damper also).
3.Defective fresh air damper.
4.Defective fan switch.
Unit removes some water, but not as much as expected.
1.Air temperature and/or humidity have dropped.
2.Humidity meter and or thermometer used are out of calibration.
3.Unit has entered defrost cycle.
4.Air filter dirty.
5.Defective defrost thermostat.
6.Low refrigerant charge.
7.Air leak such as loose cover or ducting leaks.
8.Defective compressor.
9.Restrictive ducting.
10.Optional Condensate Pump Safety Switch open.
Unit Test to determine problem:
1.Detach field control wiring connections from main unit.
2.Connect the yellow and green pigtails from the main unit together; only the fan should run. Disconnect the wires.
3.Connect the yellow and blue pigtails from the main unit together; the compressor and fan should run.
4.If these tests work, the main unit is working properly. You should check the control panel and field control wiring for problems next.
5.Remove the control panel from the mounting box and detach it from the field installed control wiring. Connect the blue, yellow, and green wires from the control panel directly to the corresponding colored pigtails on the main unit. Leave the violet, white and red wires disconnected!
6.Turn on the fan switch; the fan should run. Turn off the fan switch.
7.Turn on the humidity control; the compressor and fan should run.
8.If these tests work, the problem is most likely in the field control wiring.
11.3 Refrigerant Charging
If the refrigerant charge is lost due to service or a leak, a new charge must be accurately weighed in. If any of the old charge is left in the system, it must be recovered before weighing in the new charge. Refer to the unit nameplate for the correct charge weight and refrigerant type.
11.4 Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external overload and a run capacitor, but no start capacitor or relay.
CAUTION
11.5 Electric Ventilation Damper
The electric ventilation damper is controlled by the ventilation timer. The damper will open when the ventilation timer is activated to allow fresh air into the structure through the 6" diameter fresh air inlet duct. The electric ventilation damper will remain closed when the ventilation timer is not activated to prevent
The damper opens in one direction only. The damper rotates very slowly, allow sufficient time for the damper to cycle. The damper will take approximately one minute to cycle from closed to open or from open to closed.
If the electric ventilation damper fails to operate:
1.Check that the wiring is correct and that voltage is present at the damper motor.
2.Check for any obstruction inside the damper. If the electric ventilation damper fails to operate after performing these checks, it must be replaced.
11.6 Condensate Pump Kit
An optional condensate pump kit is available from the factory for use with the
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