Page 6
– Bulletin 100-50-2.1
PROBLEM
CHECK
IB-G DOES NOT
POWER ON
See Figure 3. The RED LED should be on if the IB-G has supply voltage. If not, check for proper supply voltage
across terminals 24V+ and 24-. The transformer must be an isolated secondary type.
IB-G CONTINUOUSLY
STARTS UP THEN RESETS
Check for reverse polarity across terminals 24V+ and 24V-.
If multiple IB-Gs are used on one power supply, ensure that all the polarities are correct across the boards.
Check and ensure ground potentials are the same for the power supplies for both the IB-G and external
controller.
VALVE DOES NOT MOVE
WITH CONTROL SIGNAL
Ensure RED status LED is on to indicate IB-G is powered.
If GREEN LED is solid:
Check to ensure terminals ‘OPN’ and ‘REF’ are not shorted.
If GREEN LED is blinking:
Check valve wiring to ensure proper location on the IB-G.
Measure control signal across terminals S+ and S- and ensure it matches the IB-G position established by
the ‘OPN’ LED. For example if the control signal measures 5VDC, ensure the GREEN LED is blinking 4-5
times to denote approximately 50%. See Figure 3 for LED location.
Check to ensure DIP switch #4 is set correctly.
Check valve for short or open. (see ‘Test the Valve’ instructions in Troubleshooting section)
If YELLOW LED is solid:
Check to ensure terminals ‘CLS’ and ‘REF’ are not shorted.
Check to ensure DIP switch #8 is set to OFF.
Note: A short across terminals ‘OPN’ and ‘REF’ will position the valve at 100%.
Note: DIP switch #8 can be placed in ‘ON’ position to manually position the valve to 0%.
VALVE DOES NOT
OPEN TO 100%
If GREEN LED is solid: This denotes that the IB-G has electronically positioned the valve at 100%.
Check to ensure valve stroke is set correctly based on DIP switches 1-3; see Table 2.
Check to ensure DIP switch #4 is set correctly.
Check valve for short or open. (see ‘Test the Valve’ instructions in the Troubleshooting section)
If GREEN LED is off or blinking:
Check signal across terminals S+ and S-. The signal should be 10VDC or 20mA depending on jumper
selection found in Table 1.If using 4-20mA control signal, ensure proper selection of impedance to match
requirement of external controller.
Check to ensure DIP switch #5 is set correctly.
Check to ensure DIP switch #8 is set to OFF.
Check to ensure there is not a short across terminals ‘CLS’ and ‘REF’.
Note: A short across terminals ‘OPN’ and ‘REF’ will position the valve at 100%.
VALVE DOES NOT
CLOSE TO 0%
If YELLOW LED is solid: This denotes that the IB-G has electronically positioned the valve at 0%.
Check to ensure valve stroke is set correctly based on DIP switches 1-3; see Table 2.
Check to ensure DIP switch #4 is set correctly.
Check valve for short or open. (see ‘Test the Valve’ instructions in the Troubleshooting section)
If YELLOW LED is off:
Check signal across terminals S+ and S-.
The signal should be 0VDC or 4mA depending on jumper selection found in Table 1.
Check to ensure there is not a short across terminals ‘OPN’ and ‘REF’.
Check to ensure DIP switch #5 is set correctly.
Note: DIP switch #8 can be placed in ‘ON’ position to manually position the valve to 0%.
VALVE MOVES THE
WRONG WAY
Check valve wiring to ensure lead wires match color code on the IB-G terminals.
Check DIP switch #5; this reverses direction of the valve.
GREEN LED IS BLINKING
This denotes normal operation. The blinking indicates how far the valve is open. For example 2 blinks is
approximately 20% open.
ALL LEDS ARE BLINKING
This denotes that the DIP switches are positioned in an invalid configuration.
Check DIP switches, Table 3, to ensure IB-G is set up correctly.
