Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 362)

<6. Maintenance>
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IM 11B08A01-01E
Fuses
Figure 6.5
(3) Relays and Relay boards
There are two types of relays depending on the specifi cations.
• One protection system (see Figure 6.2 (a))
The relays are installed on the relay board in the protection system A. See “A. Relay board”
below to replace the relay board.
• Two protection systems (see Figure 6.2 (b))
The relays are installed inside the protection system B on the left side. See “A. Relay board”
and “B. Relays” below to replace the relay board and the relay.
A. Relay board
(1) Stop the operation. (See “3.3.4 Stopping operation” for this procedure).
(2) Stop the supply of power.
(3) Confi rm that the LED (Green) of “POWER” is OFF.
CAUTION
The isothermal oven is extremely hot after turning off the power immediately. Keep the purging
air supplied for more than an hour after turning off the power. Keep hands away from the oven
components.
(4) Loosen the locknut on the cover for the protection system A on the right side and remove the
cover.
2nd Edition : May 11, 2012-00
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