Nor-Cal IQ+ Adaptive Pressure Controller - Manual (Page 33)

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I
ntellIsys
A
dAptIve
p
ressure
C
ontrollers
IQ+ OP-LIT 9/08
10.0 - Product Support
CAUTION: DO NOT open the enclosure. Damage to equipment may occur, and unauthorized access to internal parts will void the warranty.
Troubleshooting
Some basic troubleshooting can be done by the user referring to the instructions and suggestions in the table below which describes common symptoms
and recommended actions. The Nor-Cal Products’ IQ+ controller module is designed for years of maintenance free operation. Electronics MTBF has been
determined to be in excess of 10,000 hours continuous operation. There are no user serviceable parts or components inside the enclosure. If a problem does
occur with the IQ+ control electronics or software, please refer to the basic troubleshooting instructions below or contact Nor-Cal Products Intellisys Customer
Support to obtain additional instructions or a Return Materials Authorization number.
TAbLE 10.1 – POSSIbLE FAILURE mODES AND RECOmmENDED ACTIONS
SymPtom PoSSIBle cauSeS recommended actIon
IQ+ does not appear to turn on.
No LEDs are illuminated
The IQ+ is not receiving power properly
Check external power supply, cabling and pin assignments. Try to restart the IQ+ by
reconnecting power supply. Operate OPEN/CLOSE switches.
The IQ+ is on (one or more
LEDs illuminated) but it will not
respond to commands
The initialization safety lock function is active.
The amber FAULT LED should be on and the
OPEN/CLOSE LEDs should be blinking
Execute an initialization sequence. Issue a DeviceNet initialization command or send the J4
command via the RS-232 serial port.
The RS-232 serial connections are not
properly made.
Check cabling and pin assignments. Make sure CTS, RTS and DSR connections are not made.
Communication settings disagree between
the IQ+ and the host
If RS-232 is used, make sure host is set for 9600 Baud, 1 stop bit and no parity. Cycle power
to the IQ+ to refresh dip switch setting.
A communications timeout has occurred Call for Intellisys Technical Support
The IQ+ does not operate and
only the amber FAULT LED is on.
The valve plate and/or actuator is jammed
Cycle power to attempt re-initialization of the valve. For Butterfly Valves, turn power OFF
and try to move the valve plate by hand. If the valve plate is stuck, call of Intellisys Technical
Support
There is something wrong with the motor
drive circuitry or the internal power supply
circutry
Call to obtain an RMA#
Pressure control performance is
unsatisfactory
The IQ+ is not receiving the gauge pressure
signal, or the signal is very noisy
Check the gauge cabling and signal stability. Also, check for electrical noise or system
vibrations, especially if a 100 m Torr (or similar) gauge is used.
The IQ+ is in valve position control mode Put the IQ+ in the correct mode by issuing the proper RS-232 or DeviceNet command
System design or operating range may be
outside the capabilities of the Adaptive
Pressure Control Algorithm
Adjust System Parameters: Volume, Delay, Speed
The controller / valve will not
respond to a new set-point value
The new set-point value is too close to the
old set-point vlaue
When using serial communications, the difference between two set-point values should be
more than 0.01%
There is too much noise on the Gauge signal Change the Gauge Cable
The LEDs are illuminated in an
unknown fashion
Please refer to Table 12.2 describing valid LED combinations.
WARNING: When working with or troubleshooting Nor-Cal APC products extreme care must be taken to avoid putting bodily parts
in or near the valve gate mechanism or other moving parts. These may move suddenly and unexpectedly, and many of them are driven
with sufficient force so as to cause significant harm and possibly even dismemberment. Nor-Cal Products recommends that a lock-out
and tag-out procedure be strictly followed whenever human physical intervention is required on any of its control valves.