GRUNDFOS INSTRUCTIONS
With the PHT-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
• Valve 1 Over Current
• Valve 1 Under Current
• Valve 2 Over Current
• Valve 2 Under Current
With the PHT-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 must 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 button for 2 seconds.
To program these outputs:
1 - Enter the Engineers menu and navigate to Programmable output pages.
2 - Enter the edit mode by pressing the OK button.
3 - Use the UP and DOWN keys to navigate the list of faults that can be programmed
4 - When the desired fault is at the top of the stack press OK, this will select the fault.
5 - Select any further fault outputs as required.
6 – Exit the menu by pressing the Home key.
Fig. 7 – Location of programmable outputs
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