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Page 2 / 6 PV500-40 01/25/11
1. DISPLAY AND INTERFACE
1.1 KEYBOARD BUTTONS
SET
- Displays and modifies the temperature set points.
- In programming mode, it selects a parameter or confirms an operation.
UP
- Displays and modifies the energy saving (Night Time setback) settings.
- In programming mode, it browses the parameter codes or increases a
displayed value.
DOWN
- Displays the working hours of the load relays.
- In programming mode, it browses the parameter codes or decreases a
displayed value.
CLOCK
- Changes lower display from Probe 1 (Depending on product, probe 1 may
display lower tank/inlet or upper tank/outlet temperature or may not be used.) to
current time and day.
EXT
- Changes upper display from Outlet Temperature to Probe 3 (Optional
Temperature Probe. Used for Outdoor Reset on Boilers) and displays the
temperature difference of the Inlet Temperature minus Outlet temperature.
In programming mode it sets the 4-20mA output (password is required).
ON/OFF
- Switches the control ON or OFF.
1.2 KEY COMBINATIONS
+
To lock and unlock the keyboard.
+
To enter the programming mode.
+
To exit the programming mode.
1.3 LED ICON LEGEND
LED MODE Function
ON Temperatures are displayed in Fahrenheit degree
ON Temperatures are displayed in Celsius degree
Flashing Call for heat time delay
ON Call for heat is on
Flashing Second stage time delay (On 2-stage units only)
ON Second stage on
Flashing Freeze protection time delay
ON Freeze protection on
ON Modulation output signal is in manual control mode
ON Modulation output signal is automatically controlled by temperature probe 1
Ext
ON The outside temperature is displayed
FLASHING Low gas pressure alarm
FLASHING High gas pressure alarm
FLASHING Low-water alarm
ON Lower LED readout is displaying the clock
FLASHING Alarm signal
FLASHING Programmed working hours limit is exceeded
ON Working hours are displayed in Lower LED readout
ES ON The energy saving function is running