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Failure Diagnosis
Failure Diagnosis of Inverter Unit
(2) When inverter abnormality (E6XX to E7XX) is generated
Possible cause is as follows. Check all of the following causes.
Cause
Method of Checking
Method of Action
Overload condition
(1) Check if the compressor motor current or fan motor, or
both are high.
(2) Check if any overload condition occurred even in a
short duration of time.
Eliminate the cause of overload.
Abnormality of power voltage Check if the supplied power voltage to the refrigeration unit is
in the range of 380 V ± 38 V / 400 V ± 40 V / 415 V ± 41 V.
Execute maintenance of the
power supply facility.
Failure of the Inverter A1000
and Inverter V1000
When the supplied voltage to the refrigeration unit is in the
range of 380 V ± 38 V / 400 V ± 40 V / 415 V ± 41 V, check
if any abnormality exists in the appearance of the Inverter
A1000 and Inverter V1000.
Replace the Inverter A1000 or
Inverter V1000, or both.
When an external cause such as momentary power failure or lightening, or short duration of overload
occurs, an error is generated by momentary overcurrent even without any component failure.
Caution
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