Daikin GYEQ20AN Service Manual page 159

SiAUY361411EA
20
Misfire Detected
Sub-code 0: During 60 cycles, 48 or more misfires are reported 30 times consecutively.
Sub-code 1: The voltage equivalent to the primary coil current of cylinder #1 remains 0 for 1 second.
Description
Sub-code 2: The voltage equivalent to the primary coil current of cylinder #2 remains 0 for 1 second.
of the failure
Sub-code 3: The voltage equivalent to the primary coil current of cylinder #3 remains 0 for 1 second.
Sub-code 4: The voltage equivalent to the primary coil current of cylinder #4 remains 0 for 1 second.
Possible Ignition system failure; fuel supply failure; intake/exhaust system failure; mixer failure; regulator failure
causes
of the failure
Flow chart
Is Ignition System
Operating Normally?
YES
Is Fuel Gas Type Switch
Setting Correct?
YES
Is Engine Compression
Pressure Normal?
YES
Are Air Intake And Exhaust
Ports Free From Clogging?
Is Air Cleaner Free From Clogging?
YES
Is Mixer Operating Normally?
YES
Check Regulator.
Troubleshooting
NO
Check Ignition System.
NO
Configure Outdoor Unit's
Circuit Boards.
NO
Check Compression Pressure.
NO Check Air Intake And Exhaust Ports.
Check Air Cleaner.
NO
Check Mixer.
Flow Charts for Troubleshooting
025883-00E
Error
H0
code
148