Troubleshooting Guide; Troubleshooting Based On Pilot Lamp Indication; Troubleshooting And Repair Procedure - Hitachi UC 10SL2 Service Manual

1. Troubleshooting based on pilot lamp indication

Problem
Pilot lamp fails to go on or flash.
Pilot lamp indicates abnormality by
flashing rapidly at 0.1 second
intervals.
Pilot lamp does not go on after
battery has been connected.
(Charging does not start.)
Pilot lamp remains flashing (on for
1 second, off for 0.5 second) after
battery has been connected.

2. Troubleshooting and repair procedure

(1) Trouble mode (A)
Pilot lamp fails to go on or flash.
Is rated voltage
applied to the
plug?
YES
Is there continuity
between blades
of the AC cord
plug?
YES
Faulty internal circuit
Replace the PCB.

TROUBLESHOOTING GUIDE

(1) Faulty AC cord
(2) Blown fuse (3.15 A) on primary side
(3) Faulty PCB
(1) Poor connection of terminal
(2) Faulty battery (open circuit)
(3) Faulty PCB
(1) Poor connection of terminal
(2) Faulty battery (open circuit)
(3) Faulty PCB
(1) Poor connection of terminal
(2) Faulty battery (open circuit)
(3) Faulty PCB
NO
Apply rated voltage.
NO
Check with a tester.
(About 1 k )
A) on the primary
Typical cause
Is there an YES
open circuit in
the AC cord?
NO
Is the fuse (3.15
YES
side blown?
NO
-3-
Check procedure
See trouble mode (A).
See trouble mode (B).
See trouble mode (C).
See trouble mode (D).
Replace the AC cord.
Replace the fuse (3.15 A).