B-10
Possible trouble conditions:
• Chillgard RT Remote Relay Module losing communication with the
Chillgard RT Refrigerant Monitor for longer than two seconds
• Refrigerant Monitor internal trouble
• Relay Module inoperative relay.
See Section 4, Troubleshooting Guidelines for other possible trouble
conditions.
Ready Indicator
• The Ready Indicator turns ON and stays ON when the controlling
Chillgard RT Refrigerant Monitor is ready and Relay Module is
operating properly
• This indicator remains OFF during the initial warm-up
• This indicator remains OFF during the initial Chillgard RT
Refrigerant Monitor warm-up, setup and calibration.
Chillgard RT Relay Module Relays
There are three types of relays in the Chillgard RT Relay Module:
• common horn relay
• common trouble relay
• discrete alarm relays
The Common Horn Relay:
• is a double-pole, double-throw (DPDT) type relay
• contacts are normally connected to equipment to alert personnel of
an alarm condition
The Trouble Relay:
• is a double-pole, double-throw (DPDT) type relay
• is normally-energized during normal operation for fail-safe
operation
• de-energizes if power is removed
• contacts may be connected to equipment to alert personnel that a
trouble condition exists
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