Overvoltage / Low Voltage Error - Samsung AM072BXV Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-47 /
Outdoor unit display
• Input wiring error EMI fuse open.
Judgment Method
• DC-Link Overvoltage / Low voltage occurs.
- Check the power source wiring. (R/S/T/N wire crossed or not connected)
Cause of problem
- Check the power source voltage. (Rated voltage ±10%)
- Check the fuses on EMI PBA. (fuse is normally short)
1. Cause of problem
Power Off
Is Power
connection accurately
conected?
Yes
Is EMI PBA
R,S,T Wire and Terminal-block
connector accurately
connected?
Yes
Did the Fuse is short?
Yes
Is Reactor
accurately connected
Yes
Is Inverter
PBA R,S,T Wire and EMI PCBA
connector accurately
connected?
Yes
Replace Inverter PBA
Samsung Electronics

Overvoltage / Low voltage error

(INVERTER1 PBA)
(INVERTER2 PBA)
No
Power Cable re-connection
No
Check the connector connection
No
No
Check the Reactor
connection
No Power Off and then
re-connection
Type of
Power Source
F
J
Is the resistance
value between different
phases of Compressor. (U ↔ V, V ↔ W,
W ↔ U) less than 2Ω?
Is the resistance
between the body of Compressor and
chassis MΩ?
Standard AC Voltage(Vac)
AC Input
Voltage
Min.
208~230V 177
460V 391
No
Replace Compressor
No
Replace Compressor
Standard DC Voltage(Vdc)
Max. Min. Max.
265 250 374
552 553 781
136