Daikin GYEQ20AN Service Manual page 144

Flow Charts for Troubleshooting
3
Engine Stall
Description
Sub-code 0: While the unit is running, the engine speed falls to 400 min
of the failure
Possible Fuel supply failure; ignition system failure; intake/exhaust system failure; incorrect compression;
causes incorrect valve clearance; compressor failure; oil level high; refrigerant system failure
of the failure
Flow chart
Is Fuel Gas Type
Setting Correct?
YES
Is Oil Level Normal?
YES
Is Ignition System
Operating Normally?
YES
Are Air Intake And
Exhaust Ports And Air Cleaner
Free From Clogging?
YES
Is Mixer Operating Normally?
YES
Is Regulator
Operating Normally?
YES
Are Gas Valves
Operating Normally?
YES
Is Valve Clearance Appropriate?
YES
Is Engine Compression
Pressure Normal?
YES
Are Compressors
In Non-Locked State?
YES
Are You Sure There Is
No Abnormal Refrigerant
Pressure Rise?
YES
Is Crank Pulse Sensor
Operating Normally?
YES
Check Gas Pressure.
(whether Gas Pressure is
stable)
133
NO
Configure Main Circuit Board.
NO
Check Oil Level.
NO
Check Ignition System.
NO
Check Air Intake And
Exhaust Ports.
NO
Check Mixer.
NO
Check Regulator.
NO
Check Gas Valve System.
NO
Check Valve Clearance.
NO
Check Compression
Pressure.
NO
Check Compressors.
NO
See Flow Chart in "Abnormal
High-Side Pressure" Section.
NO
Check Crank Pulse Sensor.
-1
or lower.
025866-00E
SiAUY361411EA
Error
E2
code
Troubleshooting