194
Troubleshooting
Symptom Check Item, or Cause Remedy and Reference
Voltage or current
measured values are not
displayed.
• Are the voltage cord
and current sensors
connected properly?
• Are the input channels
and displayed channels
correct?
• Has an appropriate
current range been
selected?
Verify the connections and wiring.
See “4.3 Connecting Voltage Cords to Instrument”
(p. 51) through “4.9 Checking Wiring” (p. 59).
Measured values do not
stabilize.
• Is the frequency of
the measuring line
50 Hz/60 Hz?
The instrument is not
supporting 400 Hz
frequency lines.
The instrument can only be used with 50/60 Hz lines.
400 Hz frequency cannot be measured.
• Is there any voltage input
applied?
The instrument may not be able to perform stable
measurement without voltage input to U1 (Sync source).
Unable to charge the
Z1003 Battery Pack (the
Charge LED does not light
up).
• Verify that the ambient
temperature is within the
range of 10°C to 35°C.
The instrument’s battery can be charged within the
ambient temperature range of 10°C to 35°C.
• Has the instrument been
stored for an extended
period of time with the
battery pack installed?
The battery pack may be degraded. Please purchase
a new battery pack. Contact your authorized Hioki
distributor or reseller. If you do not want to use the
instrument for one month or longer, remove the battery
pack and store at −20°C to 30°C.
If the cause of the issue remains unclear, execute a system or factory reset. Doing so will initialize
settings to their factory defaults.
See “System reset (Default)” (p. 76) and “Factory reset (Default)” (p. 77).
Replaceable parts and operating lifetimes
The characteristics of some of the parts used in the product may deteriorate with extended use. To
ensure the product can be used over the long term, it is recommended to replace these parts on a
periodic basis.
When replacing parts, please contact your authorized Hioki distributor or reseller.
The service life of parts varies with the operating environment and frequency of use. Parts are not
guaranteed to operate throughout the recommended replacement cycle.
Part Life Notes
Lithium battery Approx. 10 years The instrument contains a built-in backup
lithium battery. The backup battery offers
a service life of about 10 years. If the date
and time deviate substantially when the
instrument is switched on, it is the time to
replace that battery. Contact your authorized
Hioki distributor or reseller.
Electrolytic Capacitors Approx. 10 years The service life of electrolytic capacitors
varies with the operating environment.
Requires periodic replacement.
LCD backlight (with 50%
brightness)
Approx. 50,000 hr Requires periodic replacement.
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