Condenser Fan and Evaporator Fan Rotation

注意 If both the condenser fan and evaporator fans are rotating backwards, diagnose the automatic phase selection system.
上级主题： 电气维护

Check Condenser Fan Rotation

Check for proper condenser fan rotation by placing a small cloth or sheet of paper against the condenser fan grille on the front of the unit. Proper rotation will blow the cloth or paper away from the grille. Improper rotation will hold the cloth or paper against the grille.

If the condenser fan is rotating backwards, refer to the unit wiring diagram to correct fan motor wiring at the fan motor junction box or condenser fan contactor. To correct improper fan rotation, reverse any two fan power cord leads at the condenser fan contactor (disconnect power supply before reversing leads). Do not move the CH ground wire.

Check Evaporator Fan Rotation

Visually inspect the evaporator fan blades for proper rotation. Arrows located on the underside of the fan deck indicate the correct direction of rotation.

Check both high and low speed evaporator fan rotation by performing Evaporator High and Evaporator Low tests from the Manual Function Test menu.

If an evaporator fan is rotating backwards on one or both speeds, refer to the unit wiring diagram to correct motor wiring at the fan motor junction box or evaporator fan contactor (disconnect power supply before reversing leads). Do not move the ground wire which is labeled CH.

注意 Evaporator fan motor wires EF1, EF2, and EF3 are used on low speed fan operation. Wires EF11, EF12, and EF13 are used on high speed fan operation.

Reversing Power Phase on Units

Use the incoming power cable leads to reverse the power phase. This is recommended on units because the Jumper J18 does not reverse power to the scroll compressor. This protects against the possibility that the compressor will be out of phase with the condenser and evaporator fans when the unit is plugged into a new power supply

To reverse the Power Phase, complete the following steps:

  1. Turn the unit 460/380V main circuit breaker off.

      危险
    • 危险电压
    • 断开控制器的连接后，如果主电源模块存在 460/380 V 的电源，设备将自动启动并运行。 为了防止旋转电机或高压控件的危险电击对人体造成伤害，在准备 Manual Emergency （手动紧急制动）模式操作前请先断开设备的电源接线。

  2. Disconnect unit power cord from power supply.

  3. Relocate the position of the white and black incoming power cord leads at the 460/380V main circuit breaker.

  4. Connect unit power cord to proper power supply.

  5. Start the unit again by turning the unit 460/380V main circuit breaker on and the Unit turned On and allow Unit to start and stabilize.

  6. Check condenser airflow again to confirm correct fan rotation.