Electronic Expansion Valve Coil Abnormality, Dust Clogging - Daikin SkyAir RZR-TA Series Service Manual

Troubleshooting by Error Codes
4.16 Electronic Expansion Valve Coil Abnormality, Dust
Clogging
A9
Error Code
Applicable All indoor models
Models
Method of Error Electronic expansion valve coil conditions are checked via microcomputer.
Detection The electronic expansion valve main body is checked for dust clogging via microcomputer.
Error Decision Pin input for electronic expansion valve coil is abnormal when initializing microcomputer.
Conditions Either of the following conditions is seen/caused/occurs while the unit stops operation.
 R1T – R2T > 8°C (14.4°F)
 R2T shows fixed degrees or below.
R1T: temperature of suction air
R2T: temperature of liquid pipe of heat exchanger.
Supposed  Defective electronic expansion valve coil
Causes  Defective indoor unit main PCB
 Defective relay cables
234
SiUS281811EA
Part 6 Service Diagnosis