Heat Controller Water Source Heat Pump - Manual (Page 105)

WattMaster WHP Section 4
Start-Up and Troubleshooting 4-23
5.2 Alarms
When an alarm occurs in the WHP or Loop Controller, it is reported to the System
Manager. The alarms cause the light on the System Manager to illuminate. The View
Alarms screen will indicate the address of the alarms. The Status screen will display the
type of alarm that has occurred. Here is a list of the alarms that are reported to the System
Manager.
WHP:
Bad Space Sensor – Space sensor is either open or shorted
Hi Space Temp Alarm – If space temperature is 5
°
or more above cooling setpoint
Lo Space Temp Alarm – If space temperature is 5
°
or more below heating setpoint
Dirty Filter Alarm – Contacts between AIN4 and GND are shorted
Cooling Failure – If supply air doesn’t drop 5
°
in 10 minutes in cooling mode
Heating Failure - If supply air doesn’t go up 5
°
in 10 minutes in heating mode
Loop Controller:
Pump Failure – No proof of flow within 5 seconds after pump starts
No Flow Detected – The contact between AIN3 and GND is open, no water flow
Phase Shutdown – The contact between AIN7 and GND is open, loss of phase
Lo Water Temp Alarm – Water Temp is below Lo Limit setpoint
Hi Water Temp Alarm - Water Temp is above Hi Limit setpoint