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Owner's manual (8 pages)

Table Of Contents

Table of Contents

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3-1-5 Check operation of +12 volt and +48 volt detector circuits

1. Check that about 4 ± 2 seconds after power is turned on while the power supply unit's primary line (CN103 of AC 1/3

circuit board) is disconnected; among the 4 voltage display LED, the +12, +48 "CAUTION" LED lights up ("NORMAL"

LED of +16, -16 light up). Also check that the unit shuts down about 8 ± 2 seconds after power is turned on but that

the two +12V, +48V "CAUTION" LED and "POWER" LED remain lit up.

2. Check that about 4 ± 2 seconds after power is turned on while the power supply unit's secondary line (CN110 of AC

1/3 circuit board) is disconnected; among the 4 voltage display LED, the +12 "CAUTION" LED lights up and (+16, -16,

+48 "NORMAL" LED light up). Also check that the unit shuts down about 8 ± 2 seconds after power is turned on but

that the 1 "CAUTION" LED (+12) and "POWER" LED remain lit up.

After making the above checks, reinsert the connectors that were removed in each item to make the above checks.

3-1-6 Check operation of FAN STOP detector circuit

Clamp the fan so that it does not rotate. Then check that the "NORMAL" LED and "STOP" LED (red) light up about 4 ± 2

seconds after power is turned on. Make this check separately for the 2 left and right fan units.

After finished making the above check be sure to unclamp the fan.

Fig. 3) LED and panel peripheral component names

POWER

L 13942296513

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