Fujitsu Airstage J-IVS AJ 040LCLDH Series Design & Technical Manual page 716

¢ 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
1ø 50 Hz 230 V
Indoor unit power supply
1ø 50 Hz 230 V
Total Sub Breaker ≤ Main Breaker
4-2. Power supply cable
AJ 054
Sub Breaker
32 A
Power cable
Sub Breaker
2
6 mm
32 A
Power cable
Sub Breaker
2
6 mm
32 A
Power cable
2
6 mm
Sub Breaker
20 A
Indoor units
Terminal board
Sub Breaker
20 A
Indoor units
- (06-56) -
Outdoor units
AJ 045 AJ 040
Connected within
refrigerant system.
Total MCA ≤ 15 (A).
Power cable
2
2.5 mm
4. Wiring design