Troubleshooting For Sa Indoor Unit - Ffq Series; Indoor Unit Pcb Abnormality - Daikin 2MKS40G2V1B Service Manual

Troubleshooting for SA Indoor Unit - FFQ Series

6. Troubleshooting for SA Indoor Unit - FFQ Series

6.1

Indoor Unit PCB Abnormality

A1
Remote
Controller
Display
Method of The system checks the data from EEPROM.
Malfunction
Detection
Malfunction When the data from the EEPROM is not received correctly
Decision
EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds
Conditions
its content without power. It can be erased, either within the computer or externally and usually
requires more voltage for erasure than the common +5 volts used in logic circuits. It functions
like non-volatile RAM, but writing to EEPROM is slower than writing to RAM.
Supposed
Causes
Troubleshooting
223
Defective indoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Switch the power off and on
again to restart.
Normal?
YES
NO
SiBE12-816_D
Replace the indoor unit PCB.
External factor other than malfunction.
(for example, noise etc.)
Service Diagnosis
(R11294)