Error Based Troubleshooting; A1-01 - Indoor Unit Pcb Abnormality - Daikin Sky Air FAA71BUV1B Service Manual

3 | Troubleshooting

3.3 Error based troubleshooting

3.3.1 A1-01 – Indoor unit PCB abnormality
Service manual
24
Component Forced cooling
Drain pump ON
Additional info
▪ The unit will NOT regulate the temperature during emergency operation.
▪ During emergency operation, do NOT attempt to operate the system using the
remote controller. The remote controller shows "88" while emergency operation
is active on the indoor unit.
▪ If a safety device is activated during emergency operation, all actuators are
turned OFF.
▪ In cooling operation, the unit runs for 20 minutes and then stops for 10 minutes
in order to avoid freeze‑up of the indoor unit coil.
▪ In heating operation, defrost is activated for 3 minutes, once every hour.
▪ Emergency operation CANNOT be carried out when the PCB itself is seriously
damaged.
▪ Make sure to set the emergency switch on both the outdoor and indoor unit
PCB.
▪ Change the position of the emergency switch ONLY when the power is turned
OFF.
▪ When the communication between the indoor unit(s) and outdoor unit is
repaired, emergency operation will stop and the system returns to normal
operation.
Trigger
Data read error from
EEPROM.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a power reset. If the error disappears and is raised again after a
while, check for the presence of an external source causing electrical noise.
See "5.4 External factors" [
Possible cause: External source may cause interference.
2 Perform a check of the indoor unit main PCB. See
4
PCB" [ 53].
Possible cause: Faulty indoor unit main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Forced heating
ON
Effect
Unit will stop operating.
4
88].
Forced defrost
ON
Reset
Power reset via outdoor
unit.
"4.5 Indoor unit main
FAA71+100BUV1B
Sky Air indoor units
ESIE22-01 – 2022.02