Daikin VRV RSXYP16KJY1, Руководство по обслуживанию

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VRV in General Si30-408
110 Cases for Examination
1. VRV in General
1.1 Malfunction "E3" is Displayed in Cooling Operation.
Applicable
Models VRV Plus series (L unit)
Condition 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).
Cause 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.
Measure Recovers by replacing the electronic expansion valve drive coil of the STD outdoor unit 2.
Point of
Diagnosis When examining multiple outdoor units, do not inspect only the inverter outdoor units but
inspect STD outdoor units 1 and 2.
1.2 Malfunction "F6" is Displayed during Check Operation in
the Winter Season.
Applicable
Models RX(Y)(Q)
~
M (VRV II series)
Condition A malfunction "F6" (overcharge of refrigerant) is displayed when a "check operation" is
executed as a test operation under the condition of low outdoor temperature in the winter
season.
Cause Due to temporary refrigerant mixing into refrigerating oil, misjudgment is made when a "check
operation" is executed under the condition of low outdoor temperature.
Measure The condition completes by executing the "check operation" again.
Point of
Diagnosis Be sure to execute a "check operation" with the front panel closed. Or, misjudgment is made
even if the outdoor temperature is low.
Conditions Possible misjudgment
Low outdoor temperature F6
High outdoor humidity E3, E4. UF