Samsung DVM S ECO BIG Series Service Manual page 53

■ Checklist before auto trial operation
1. Check the power cable and communication cable of the indoor and outdoor unit.
2. Supply power to the outdoor unit 6 hours before trial operation to pre-heat the crank case heater.
3. Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase.
(Crankcase heater to be heated sufficiently.)
R, S, T, N terminal: check if the voltage is within 380 - 415 V between wires (R - S, S - T, T - R) and 200 - 240 V between phases (R-N,
S-N, T-N).
4. When the power is supplied, outdoor unit will execute tracking to check the indoor unit connection and other optional functions.
5. Write down the installation report on the service history report paper attached on the front part of the control box.
Supply power to the outdoor unit 6 hours before auto trial operation to pre-heat the crank case heater.
CAUTION
6. Guaranteed range of auto trial operation.
- For precise judgment, you must perform auto trial operation in below indoor/outdoor temperature condition.
■ Checklist before auto trial operation
Samsung Electronics
40
30
20
10
0
-10
-20
5 10 15
Outdoor temperature ( °C)
- - - -
───
20 25 30 35
Cooling mode
Heating mode
Troubleshooting
40 45
4-11