Service manual

ESIE03–01 Error Codes: Outdoor Units
Part 3 – Troubleshooting 3–43
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3
4
5
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3.3 Failure of Outdoor Unit PC Board (E1)
Remote Controller
Display
E1
Method of
Malfunction
Detection
A microcomputer checks whether or not E
2
PROM is normal.
Malfunction
Decision
Conditions
The E
2
PROM is malfunctioning when the power supply is turned on.
Possible Causes P Faulty outdoor unit PC board
Troubleshooting
Caution Be sure to turn off power switch before connecting or disconnecting the connector, or parts damage
may occur.
Turn the power supply
off once and then
back on.
Reset normally?
NO
YES
Could result from external
cause (e.g. noise) other than
malfunction.
Replace the control PC board