Haier H2SU-14TK/R2DB-OUT Manual De Uso página 19

Install a explosion-proof breaker for current leakage at the
power source to avoid the risk of the electric shock.
Without a breaker for current leakage will cause risks
of electric shock, fire or explosion.
Do not use large-capacity fuses,steel wire,or copper wire.
Damaging the unit ,fire,smoke or explosion will be
caused otherwise.