-12
-
Ⅷ
.
Trouble shooting
Symptoms
Possible Causes
Remedies
Can
’
t power on
(LED
power
indicator lamp is
off, without any
display)
No batteries
Set the batteries
Wrong battery type
Replace with right type
Insufficient capacity of
battery
Replace the batteries
Faulty battery polarity
Install batteries in correct
polarity
Poor contact of battery
contacts
Replace the battery contacts
Battery cover not
completely covered
Cover it again
Defect of circuit
component
Repair or replace the PCB
LED dim display
Insufficient capacity of
battery
Replace the batteries
Incapable
of
measurement
The three phase wires are
not electrified
Not belong to instrument faults
Failed to clamp the wire
Clamp again refer the manual
Lead wire break
Change the lead wire
Defect of circuit
component
Repair or replace the PCB