Though an malfunction “E3 (abnormal high-pressure)” is sometimes displayed on the VRV Plus series (L unit) system, the same condition is not reproduced at the time of inspection (unintentional operation).
Electronic expansion valve of the STD outdoor unit 2, which must be opened fully during cooling operation, is malfunctioning. Since the valve is not opened, pressure for high-pressure use has exceeded and accutuated the high-pressure switch.
Recovers by replacing the electronic expansion valve drive coil of the STD outdoor unit 2. When examining multiple outdoor units, do not inspect only the inverter outdoor units but inspect STD outdoor units 1 and 2.
