Error code

Mitsubishi Electric PU code E4

No approved translation for this record yet; showing the original text.

Meaning

Remote controller signal receiving error Abnomal if indoor controller board can 1 not receive normally any data from remote controller or from other indoor controller board for three minutes. Indoor controller board can not receive 2 any signal from remote controller for two minutes.

Member details

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Possible causes

(1) Contact failure at transmission wire of remote controller (2) All remote controllers are set as “sub” remote controller. In this case, E0 is displayed on remote controller, and E4 is displayed at outdoor LED. (3) Defective transmitting receiving circuit of remote controller (4) Defective transmitting receiving circuit of indoor controller board (5) Noise has entered into the transmission wire of remote controller. (6) Remote controller is connected to the unit once, and removed without power reset. (7) Wiring regulations are not observed. Refer to (2) The transmitting specification for “A” control on page 59. •Length of wires •Number of remote controllers •Diameter of wires •Number of indoor units

Solution

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