Indoor Unit Pcb Abnormality - Daikin RZQG71~140L7V1B Service Manual

Troubleshooting by Remote Controller
4.4

Indoor Unit PCB Abnormality

A1
Remote
Controller
Display
Applicable
All models of indoor unit
Models
Method of Error
Check data from E
Detection
Error Decision
The error is generated when the data from the E
Conditions
2
E
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 E
Supposed
 Defective indoor unit PCB
Causes  External factor (Noise, etc.)
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply and turn
the power ON again.
Is it normal?
YES
184
2
PROM.
PROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds
NO
2
PROM is not received correctly.
2
PROM is slower than writing to RAM.
Replace the indoor unit PCB.
The error may be caused by an
external factor, rather than
damaged parts.
Locate the cause and correct
the situation.
ESIE12-06
Service Diagnosis