OPERATION : OVERVIEW OF THE DIGITAL CONTROLLER
LED INDICATOR LIGHTS LIGHT
MEANING
SOLUTION
Low water level. Neither combustion blower or electric backup will activate Controller is on and water level is ok
Fill unit until water level is higher than low water cut-off switch.
“Red”
“Green”
DIGITAL READOUT: TOP LINE displays one of five temperatures. The “View” button cycles through the different temperatures. TOP LINE DISPLAY TEXT TEMPERATURE RANGE Tank Temperature (TST) 35°F to 212°F Flue Gas Temperature (FGT) 80°F to 1800°F Hot Water Supply Temperature (HWS) 35°F to 210°F Hot Water Return Temperature (HWR) 35°F to 210°F Outdoor Temperature (OT) Minus 35°F to 210°F
LOWER LINE displays operational mode, alarms, and burn time.
LOWER LINE DISPLAY TEXT
MEANING
This will display only if you have the motorized air intake damper installed. When it displays, a countdown will start at 60 seconds. The damper will begin to open. When the damper finishes opening and contacts its end switch, the message will disappear and the blower motor will start. A sensor reading is an indication that a sensor is not wired properly, has a bad connection at the terminal block, has a broken wire, or a sensor itself is bad. Cycle through the different sensors using the “View” button. Pause at each one of the sensor readings. The failed sensor’s reading will flash and indicate a default code from the table below: SENSOR DEFAULT CODE OUTDOOR -40 °F TANK 00 °F W. SUPPLY 00 °F W. RTURN 00 °F FLUE 0000 °F
“DAMPR OPENING”
“SENSOR”
90
GARN® WHS 1000 and WHS 2000 Manual | © HY-C® Company LLC | October 2024
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