Check The Heatsink Temperature Sensor Of Ipm; Check Of Operation Current Abnormal Increase Mode; Check Of Current Sensor, Voltage Sensor On The Board - Samsung SH09BWHA Service Manual

Troubleshooting
6-3-7 (H) Check the defrost temperature sensor and outdoor temperature sensor.
√ Connector of outdoor unit control board
(PIN#1,2 of CN51 - outdoor temperature sensor),(PIN#3,4 of CN52-deice Temperature sensor)
Measure the resistance between two wires and if it is same as follows, it is normal but if not, replace it.
Ambient temperature
(°C)
Resistance of
thermistor [KΩ]
6-3-8 (I) Check the heatsink temperature sensor of IPM
√ This sensor is inside of the IPM module and PIN#24,25 of IPM module are the sensor terminal.
Usually PIN solder crack or short circuit with small metal object cause sensor error.
Check the object to make short circuit and solder condition of these pins.
Ambient temperature
(°C)
Resistance of
thermistor [KΩ]
6-3-9 (J) Check of operation current abnormal increase mode
√ The operation abnormal current mode is the protection control for the safe operation by detecting the operation current of
inverter aircon by the current sensor on the control board.
√ If the operation current abnormal increase occurs,
√
• The ventilation is not good because the outdoor unit is installed wrong (the ambient temperature is higher than 50 °C)
→ Reinstall the outdoor unit so that the good ventilation can be made.
√ •
å If the Refrigerant is overcharged.
→ Check the amount of Refrigerant.
å
√
• If the comp is locked.
→ Replace the comp.
å
√
• If the comp is operating without the revolution of fan motor.
→ Check the fan motor connector, replace the fan motor.
√ •
√
• If the protection cover is operating with bending to the outdoor.
→ Take out the protection cover.
√ •
å If two outdoor units are operating face to face. (the bad ventilation is made)
→ Reinstall the outdoor unit for the good ventilation.
å
å The air circulation is bad due to the attachment of falling leaves
→ Take away the leaves for the good ventilation.
å
√ Check and clean the dirt of current sensor block of outdoor control board.
√
especially • IC83 pin solder
6-3-10 (K) Check of Current sensor, Voltage sensor on the board.
√ These errors are from component trouble on the outdoor control board.
→ Replace the outdoor control board
√
24
15°C 20°C 25°C
14.68 12.09
15°C 20°C 25°C
77.4 61.4 49.1
• C437 47uF
30°C 35°C
10 8.31 6.94
30°C 35°C
39.5 31.9
• R459 47K • R461 4.7K
40°C
5.83
40°C
26
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