Fujitsu AJ 126LELDH Series Design & Technical Manual page 767

¢ Wiring example
CAUTION
• Except for emergency, never turn off main as well as sub breaker of the indoor units during op-
eration. It will cause compressor failures as well as water leakage.
• First, stop the indoor unit by operating the control unit, converter, or external input device, and
then cut the breaker.
• Make sure to operate through the control unit, converter, or external input device.
• When the breaker is designed, locate it at a place where the users cannot start and stop in the
daily work.
• Regulation of wire size and circuit breaker differs from each locality, refer in accordance with the
regional standard.
• Example 1: Using terminal board for indoor unit
Outdoor unit power supply
3ø 50 Hz 400 V: AJ*xxxLE
Indoor unit power supply
1ø 50 Hz 230 V
Total Sub breaker ≤ Main breaker
4-2. Power supply cable
AJ*090LE
AJ*072LE AJ*108LE AJ*126LE
Sub breaker
20 A
Power cable
Sub breaker
6 mm
25 A
Power cable
Sub breaker
6 mm
40 A
Power cable 10 mm
Sub breaker
20 A
Terminal board
Terminal board
Sub breaker
20 A
- (06-53) -
AJ*162LE
AJ*144LE
2
2
2
Indoor
units
Power cable
2.5 mm
Indoor
units
Connected within
refrigerant system.
Total MCA ≤ 15 (A).
2
4. Wiring design