Kaisai KMK-60RY1, Руководство по обслуживанию

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M thermal Split
82 202004
Midea
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Procedure 4.19.4
P5
Water side heat exchanger water inlet /
outlet temperature sensor is loose
1
Yes
Ensure the temperature sensor is
connected properly
No
Water side heat exchanger water inlet /
outlet temperature sensor has
short-circuited or failed
2
Yes
Replace the temperature sensor
No
Water piping contains air
Yes
Purge air from the water system
3
No
The water flow rate is not sufficient,
caused by crushed or bent water piping,
incorrect pump speed setting, high
resistance in water piping or broken
expansion vessel
4
Yes
Inspect the system and fix the error
No
Replace hydronic box main PCB
Notes:
1. Water side heat exchanger water inlet temperature sensor and water side heat exchanger water outlet temperature sensor connections are port CN6
on the hydronic box main PCB (labeled10 in Figure 4-2.1 in Part4, 2.2 "Main PCB for Hydronic System").
2. Measure sensor resistance. If the resistance is too low, the sensor has short-circuited. If the resistance is not consistent with the sensor’s
resistance characteristics table, the sensor has failed. Refer to Part 2, 1.2 “Hydronic Box Layout” and to Table 5-5.3 in Part 5, 5.1 “Temperature
Sensor Resistance Characteristics”.
3. Refer to the Split Engineering Data Book, Part 5, 15 “SPECIAL FUNCTIONS”.
4. Check water pressure on the manometer. If the water pressure is not > 1 bar, water flow is insufficient. Refer to Figures 2-1.7 and 2-1.8 in Part 2,
1.2 “Hydronic Box Layout”.
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M thermal Split
202004 83
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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