Kaisai 06RY1, Service Manual

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M thermal Mono
84 200208
Midea
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4.20 Inverter module Troubleshooting for single-phase models
Digital display output 4.20.1
Description 4.20.2

Inverter module protection.

Split stops running.

Specific error code L0, L1, L2, L4, L5, L8, L9 is displayed on the user interface and the main control board of
refrigerant
system.
Possible causes 4.20.3

Inverter module protection.

DC bus low or high voltage protection.

MCE error(DC bus low or high voltage protection or software over current protection)

Zero speed protection.

Excessive compressor frequency variation.

Actual compressor frequency differs from target frequency.

High pressure protection.

PED board self checking fail.
Specific error codes for inverter module protection 4.20.4
Table 4-4.1: Specific error codes
Specific error code Content
L0 Inverter module protection
L1 DC bus low voltage protection
L2 DC bus high voltage protection
L4 MCE error(DC bus low or high voltage protection or software over current protection)
L5 Zero speed protection
L8 Compressor frequency variation greater than 15Hz within 1 second protection
L9 Actual compressor frequency differs from target frequency by more than 15Hz protection
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