TIMER TEST 1.
Main timer inspection (1) Turn on the AC power switch. (2) Disconnect the battery plug. (to unload the charger and operate the voltage relay). (3) Close the magnet switch (MSch) forcibly by using an insulating bar and keep pressing the NORMAL, switch (black-blue) or EQUAL switch (black-blue) for 5 seconds or more. When the TEST lamp (red) and CHARGING PROGRESS indicator lamps (three lamps excluding the uppermost one) come on. Release the switch as soon as they come on, and measure with a stop watch the time until the uppermost lamp comes on. (4) If the time until UP lamp lighting after TEST lamp on is as follows and if all lamps go off immediately after that, the main timer is normal. When NORMAL switch is pressed: UP lamp on about 6 seconds later When EQUAL switch is pressed: UP lamp on about 18 seconds later
2.
Total timer inspection (1) Turn on the POWER switch. (2) Connect the battery in discharged state (as the main timer is operated first because of voltage relay operation in the fully charged state). (3) When the NORMAL or EQUAL switch is kept pressed for 5 seconds, the TEST lamp comes on the start charging. Release the switch upon TEST lamp on and measure the time until CHECK lamp on with a stop watch. (4) The total timer is normal if the time after TEST lamp on until CHECK lamp on is as follows. (The UP lamp does not come on.) CHECK lamp ON in 90 to 100 seconds. (5) The lamp goes off when the battery plug is disconnected.
Caution: If the CHARGE ONIOFF switch is pressed when a fully charged battery is connected, the main timer operates first to light the UP lamp and not the CHECK lamp. This does not indicate a total timer defect. Inspect again as described above after replacing the battery with a discharged one.