A9 Electronic Expansion Valve Coil Abnormality / Dust Clogging - Daikin VRVII Manual

A9
3.9
Coil Abnormality / Dust
Clogging
Remote Controller Display
A9
Applicable Models
All indoor models
Method of Error Detection
Check the coil condition of electronic expansion valve by
using micro-computer.
Check the dust clogging condition of electronic
expansion valve main body by using micro-computer.
Error Decision Conditions
Pin input for electronic expansion valve coil is abnormal
when initializing micro-computer.
Either of the following conditions is seen/caused/ occurs
while the unit stops operation.
Temperature of suction air – temperature of liquid pipe
of heat exchanger > 8°C.
Temperature of liquid pipe of heat exchanger shows
fixed degrees or below.
Supposed Causes
Defective electronic expansion valve coil
Defective PCB indoor unit
Defective relay cables
68
Troubleshooting by Indication on the Remote Controller
Electronic Expansion Valve