Fujitsu - Error A5

CHECKOUT:

1. Check Unit Operation

• Reset the unit by turning off power to the outdoor unit for at least 2 minutes.
• Turn power back on.
• Put the unit in Cooling mode and turn the set point to its lowest setting.
  • The unit only has one refrigerant port on the external suction line (which is high pressure in the heating mode).
  • An adapter is required for standard refrigerant hoses.

2. Check Refrigerant Pressures

• Hook-up refrigerant gauges to the pressure port on the unit.
• Monitor pressures as the system operates.

3. Weigh-In the Charge

• Unfortunately, there is no accepted method of re-charging a mini-split other that to recover all of the refrigerant and weigh-in the correct amount.