• The gas alarm indicators (yellow DS9 and DS10) and contacts are restored to
their normal state (no alarm condition).
• If connected, the SCADA system has detected the alarm.
Note: Pushing both push-buttons to acknowledge the gas alarm conditions should
turn off the indicators since the conditions are cleared during a system fault.
9.2.4.4 System Fault Alarm Cleared
1. Set the same RelayMode parameter to Normal.
2. On the H201Ci-1, verify that:
• The H201Ci-1’s display is functional again.
• The two door-mounted push-button indicators (1 and 2) are lit because the
gas alarm conditions still exist.
• The System OK indicator (yellow, DS11; item 16 in Figure 4-7) is lit.
• The System OK alarm NO contact is closed.
• The System OK alarm NC contact is open.
• If connected, the SCADA system has detected the state change of the fail
alarm relay.
Note: Pushing both push-buttons to acknowledge the gas alarm conditions should not
turn off the indicators since the conditions are not cleared.
9.2.4.5 Gas Alarms Cleared
1. Access the submenu Relays/Analog;GasH Relay.
2. Set the parameter RelayMode of this relay to Normal.
3. Access the submenu Relays/Analog;GasHH Relay.
4. Set the parameter RelayMode of this relay to Normal.
5. On the H201Ci-1, verify that:
• The two door-mounted push-button indicators (1 and 2) remain lit.
• The Alarm 1 (Gas High) indicator (yellow, DS10; item 15 in Figure 4-7) is off.
• The Alarm 2 (Gas High-High) indicator (yellow, DS9; item 14 in Figure 4-7) is off.
• The System OK indicator (yellow, DS11; item 16 in Figure 4-3) is lit.
• The Alarm 1 NO contact is open.
• The Alarm 1 NC contact is closed.
• The Alarm 2 NO contact is open.
• The Alarm 2 NC contact is closed.
• The System OK alarm NO contact is closed.
• The System OK alarm NC contact is open.
• If connected, the SCADA system has detected the state change of both gas
alarm relays.
Note: Pushing both buttons to acknowledge the gas alarm conditions should turn off
the indicators since the conditions have been cleared.
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