GRUNDFOS INSTRUCTIONS
20
7.13 Programmable Outputs.
The PHT A controller has three programable digital outputs.
Programable output 1 – Physical name D06,
Programable output 2 - Physical name D07,
Programable output 3 - Physical name D08.
These outputs can be programmed with one or as many of the fault options as needed.
With PHT A-N/D/F/V units the above outputs can programmed to be activated by any
combination of the following faults:
With the PHT A-T unit, the following eleven faults are added to the above list for Output 1(DO6)
and Output 2 (DO7)
• System 2 Flood Protection
• System 2 Excessive Consumption
• System 2 Low Pressure
• System 2 High Pressure
• System 2 Sensor Fault
• Topping up System 1
• Topping up System 2
With the PHT A-T unit, Output 3(DO8) becomes System 2 Interlock reporting the following:
• System 2 Low Pressure Alarm
• System 2 High Pressure Alarm
• System 2 Sensor Fault
• Mains Power failure
These are the conditions under which the boiler or chiller on System 2 should be disabled.
The fault buzzer will cycle between ON for 5 seconds and OFF for 10 seconds continuously until muted by
pressing and holding the OK key for 2 seconds.
• Pump 1/2 Over Current
• Pump 1/2 Under Current
• Low Water
• High Water (only when fitted)
• Low Glycol (only on V model)
• Service Required
• System 1 Flood Protection
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