Hitachi America Ltd. RCU SERIES
18
7. Check for Maintenance
Check
Part
Check Item
Check Point
Check Period
Check Method
Standards of
judgment
Daily Regular
The
Whole
Ambient
Environment
Ambient
temperature,
Humidity, Dust,
Hazardous
gases,
Oil residue
Etc.
○
seeing
tasting
thermometer
hygrometer
freezing
is
not
allowed (ambient
temperature
range :
–10
∼
40
℃
)
condensation is
not allowed at RH
(ambient
humidity :
20
∼
90 %)
The whole
Equipment
Strange
vibration,
Strange Sound
○
Seeing, Hearing
No problem
Voltage
Source
Voltage
fluctuations and
Voltage drop
○
Inverter
Input voltage
measurement
Within ±10% of
rated voltage
Main
Circuit
Overall
Point
Insulated
resistance
○
Main Circuit
Terminal to
Ground Terminal
(500V-Mega use)
No problem
Screw
extracting
○
Seeing
Sign
of overheating
○
Seeing
Terminal
Block
Damage
○
Seeing
No damage
Smoothing
Condenser
Leaking, Strain
○
Seeing, Hearing
Relay
Trembling
phenomenon
○
Hearing
Resistor
Crack,
Discoloration
○
Seeing
Cooling Fan
Vibration
Strange sound
○
Hearing
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Call 1(800)985-6929 for Sales
hitachiacdrive.com