Troubleshooting
Samsung Electronics
4-5
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Vacuum Operation
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Operation to facilitate vacuum to open the valve after the Outdoor Unit repair.
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Piping Inspection Operation
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Operation mode to check the status of the piping between the MCU and the indoor unit.
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Heat Pump Model :
Outdoor temperature is more than 15°C / Cooling commissioning start
Outdoor temperature is less than 15°C / Heating commissioning start
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Discharge Mode Operation
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Outdoor power is turned off, the Inverter PCB and Fan PCB charging a high DC voltage, so dangerous to touch.
- To replace the PCB, first turn off the power and the begin if DC voltage is discharged.
- If not use the discharge mode, the discharge time of about 15 minutes takes.
- If an error occurs, the discharge mode may not properly run. (Wait until natural discharge.)
- In particular, E 464, E364, power devices may be damaged, therefore do not use the discharge mode.
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Block the Inverter PCB 3-phase relay after connected the power, and through compressor, DC voltage is discharging.
- INV1 and INV2 DC voltage during discharge mode are displayed alternately.
- Discharge mode Display (Rotate the three page display, as shown below.)
'K' 'A' ' ' ' ‘
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DC Link Volt1 ( For example, 120[V] 0 1 2 0 display)
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DCLinkVolt2 ( For example, 120[V] 0 1 2 0 display)
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'K' 'A' ' ' ' ‘
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DC Link Volt1 …
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Discharge is complete, the power of the Inverter PCB and Fan PCB is being blocked, communication function is blocked, E206 will
occur.
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If want operation again after complete discharge mode : Restart after K3 key to Reset or Power Reset.
How to Initiate
K1 Tact Switch 7 times~11 times
Compressor
OFF
Indoor Unit/Outdoor Fan
OFF
4Way Valve
OFF
Valves
Open all valves maximum
Etc.
If not turn off the vacuum mode, the start of normal operation is prohibited.
