Kaisai KMK-60RY1, Руководство по обслуживанию

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Situation 3: L0 error appears within 2 seconds of compressor start-up
L0
U V W wire between inverter module and
compressor is not connected properly
1
Yes
Ensure U V W wire is connected properly
No
Communication port for connection to
inverter module on refrigerant system
main PCB is damaged
2
Yes
Replace the main PCB
No
Replace the inverter module
3
Notes:
1. Connect the U V W wire from the inverter module to the correct compressor terminals, as indicated by the labels on the compressor.
2. Measure the voltage between each of W-, W+, V-, V+, U-, U+ and GND when the unit is in standby. The normal voltage should be 2.5V-4V and the six
voltages should be same, otherwise the communication terminal has failed. Refer to Figure4-4.8.
Figure 4-4.8: Connection port for inverter module
3. When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the IPM module (on the reverse side of the inverter
module PCB). Refer to Figure 4-4.2.
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Condition 4: L0 error appears after the compressor has been running for a period of time and the compressor speed is
over 60rps
L0
Inverter module has overheated
Yes
Repaint the thermally conductive silica
gel on the PFC and IPM modules (on the
reverse side of the inverter module PCB)
1
No
Inverter module is over-current
2
Yes
Replace the compressor
No
Replace the inverter module
2
Notes:
1. When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the IPM module (on the reverse side of the inverter
module PCB).
2. Use clip-on ammeter to measure the compressor current, if the current is normal indicates the inverter module is failed, if the current is abnormal
indicates the compressor has failed.
Situation 5: L0 error appears occasionally/irregularly
L0
The outdoor unit ventilation is not good
Yes
Ensure enough space for unit ventilation
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