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PUMP
CALL FOR HEAT
CONTROL
ON
SETTING
ERROR
SENSOR
ERROR
INDICATOR LIGHTS
STAGE INDICATORS
The pump driver and each of the output stages' drivers has its own LED indicator. Each of
these LEDs is lit whenever the corresponding output relay is energized.
PUMP INDICATOR
The Pump Indicator is illuminated whenever the pump circuit and pump relay are ener-
gized.
CALL FOR HEAT INDICATOR
The Call For Heat Indicator is illuminated whenever a call for heat signal is present. In
most applications the thermostat connections on the control board (pg. 13) will be jumpered,
which will generate a continuous call for heat signal. The thermostat leads may also be
connected to a building management system which will produce the call for heat signal as
required.
CONTROL ON INDICATOR
The Control On Indicator illuminates if all settings and system conditions are such that the
control can function properly, and outdoor temperature cutoff temperature setting is less
than or equal to the outdoor temperature.
SETTING ERROR INDICATOR
The Setting Error Indicator is illuminated if there is a potentiometer, switch setting or jumper
placement error. Refer toTroubleshooting Guide "Setting Error LED Is On".
SENSOR ERROR INDICATOR
The Sensor Error Indicator is illuminated if either temperature sensor is out of range.
Steady on represents outdoor sensor failure, blinking represents water temperature sensor
error. See "Sensor Error LED On" in the Troubleshooting Guide (pg. 29).
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STAGES
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