Haier HPU-48C03/NAF Operation Manual page 12

When problems occur
Power supply
The parameter of power cord is over 5G 2.5mm .
2
The parameter of connect cord is 4G 0.75mm .
2
Air conditioner must use an exclusive line (over 30A)
When installation air conditioner in a wet place, try to use a circuit breaker
against current leakage.
For installation in other places, use circuit breaker as far as possible.
The breaker of the air conditioner should be all-pole switch ; and the distance
between its two contacts should be no less than 3 mm.
Such means for disconnection must be incorporation in the fixed wiring
10