Kaisai KMK-60RY1, Service Manual

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M thermal Split
56 202004
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4.4 E2 Troubleshooting
Digital display output 4.4.1
Description 4.4.2

Communication error between hydronic box and user interface.

Split stops running.

Error code is displayed on hydronic box main PCB and user
interface.
Possible causes 4.4.3

Communication wires between hydronic box and user interface not connected properly.

Communication wiring X Y E terminals misconnected.

Loosened wiring within electric control box.

Interference from high voltage wires or other sources of electromagnetic radiation.

Damaged main PCB or electric control box communication terminals block.
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