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[. . . ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONSTRUCTION VIEWS (EXTERNAL VIEWS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REFRIGERATING CYCLE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] YES NO Are 1, 2, 3 inter-unit wires normal?YES Are connections from connectors of inter-terminal blocks (1, 2, 3) of indoor/outdoor units normal?YES Does voltage between 2 and 3 of inter-terminal blocks (1, 2, 3) of indoor unit vary?* YES NO Check indoor P. C. Defect Replace NO Correct connection of connector. Check item code [14].
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* As shown in the following figure, perform measurement within
20 seconds after power ON. Black White 3 S5277G
2 1 Inter-terminal block For SM56, SM80 main circuit on control P. C. board Is DC280V applied between terminals of electrolytic capacitor of IPDU main circuit?YES NO Replace IPDU.
Is DC7V power supplied to CDB?Are cablings between Pin 2 and Pin 5 of CN800 and between IPDU and CDB normal?Correct connection of connector.
NO Is case thermo (CN500) connected?Defect Replace
Correct connection of connector.
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NO Does case thermo operate?Defect Replace YES Replace fan motor NO Replace capacitor. YES Correct connector connection/wire circuit.
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[P10 error]/[Ob error]
Is connection of float switch connector (Indoor control P. C. Defect Replace NO Does drain pump operate?Defect Replace NO NO
Correct connection of connector.
Check and correct cabling/wiring.
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[F10 error] [0C error]
Is connection of TA sensor connector (indoor P. C. YES Are characteristics of TA sensor resistance value normal?NO
Correct connection of connector.
* Refer to Characteristics-1.
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40
[P12 error]/[11 error]
Turn off the power.
Are not there connections errors or disconnection on connectors CN333 and CN334 of indoor unit P. C. NO Remove connectors CN333 and CN334 of indoor unit P. C. board.
YES
Correct connection of connector.
Does the fan rotate without trouble when handling the fan with hands?YES Are resistance values between phases at fan motor connector CN333 motor side of indoor P. C. *1 YES
NO
Replace indoor fan motor.
NO
Replace indoor fan motor.
· Are not coil windings between 1 (Red lead) and 3 (White lead), between 3 (White lead) and 5 (Black lead), between 5 (Black lead) and 1 (Red lead) opened or shorted?For resistance, see the following values. [. . . ] 8) Remove the sensor and pipe cover fixed to the discharge pipe. 9) Using a burner, remove pipe connected to the compressor.
Remarks
Compressor
Piping panel (Front) Partition board
Valve fixing plate Sensor/pipe cover Case thermo
Valves
Remove (Suction pipe)
NOTE : Pay attention to that flame does not involve 4way valve or PMV. (If doing so, a malfunction may be caused. )
10) Pull out the discharge pipe and the suction pipe of the refrigerating cycle upward. 11) Take off the compressor bolts fixing the compressor to the bottom plate. [. . . ]
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