Super Multi System - Toshiba
Super Multi System - Toshiba
Super Multi System - Toshiba
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Troubleshooting<br />
Diagnostic procedure for check code<br />
Check code Operation cause<br />
[E6] 1. Power supply error.<br />
Fixed-speed IOL, OL alarm 2. Fixed-speed compressor IOL operation.<br />
3. Service valve closed.<br />
4. Blockage in <strong>Multi</strong> Controller PMV/outdoor PMV 1.<br />
5. Miswiring of communication between indoor and outdoor units.<br />
OCR: Overload Current Relay<br />
Does OCR operate ?<br />
Check the OCR reset button.<br />
(Manual reset)<br />
No<br />
�<br />
Is OCR circuit normal ?<br />
1. OCR unit<br />
2. OCR wiring<br />
�<br />
Are gas pipe, liquid pipe, and<br />
service valve of the outdoor<br />
unit fully open ?<br />
�<br />
Is outdoor PMV 1<br />
normal?<br />
1. Connector connection<br />
2. Wiring<br />
3. Coil<br />
4. Valve unit<br />
5. Outdoor PC board<br />
�<br />
�<br />
Yes<br />
Yes<br />
Yes<br />
Is IOL circuit normal ?<br />
1. Connector<br />
2. Wiring<br />
3. Outdoor PC board<br />
Is wiring normal ?<br />
�<br />
Yes<br />
Yes<br />
Insufficient refrigerant, blockage,<br />
pipe breakage.<br />
Yes<br />
No<br />
�<br />
Repair OCR circuit.<br />
No<br />
�<br />
Open service valves fully.<br />
No<br />
�<br />
Repair outdoor PMV.<br />
No<br />
No<br />
Are the following items<br />
related to power supply<br />
normal?<br />
1. Power supply voltage is<br />
400 V ± 10%<br />
2. Phase missing, shortcircuit<br />
of fixed-speed<br />
compressor power supply<br />
circuit system<br />
�<br />
Is Mg-SW defective?<br />
No<br />
�<br />
Yes<br />
Is constant speed<br />
compressor normal ?<br />
1. Is compressor winding<br />
normal ?<br />
2. Is compressor locked?<br />
Yes<br />
�<br />
Overload operation,<br />
liquid compression<br />
(Check miswiring of the outdoor unit according to miswiring check function.)<br />
(Check there is no blockage or pipe breakage.)<br />
�<br />
�<br />
�<br />
No<br />
�<br />
Repair power supply system.<br />
Yes<br />
�<br />
Replace Mg-SW.<br />
No<br />
�<br />
Replace fixed-speed<br />
compressor.<br />
Repair IOL circuit.<br />
Set normal wiring.<br />
59
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