CleaverBrooks ProFire Q Series, Installation Operation & Maintenance

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750-437
Q Series Full Modulation
6-11
Troubleshooting
71
Any # Special position undefined
A special position (home, prepurge, ignition, or postpurge) is undefined for one of the
actuators / VSD See diagnostic codes for more information.
0 Home position
The home position for one of the actuators / VSD is undefined. Check the settings of index
00 for parameters 501 through 506. Change any settings that are undefined and reset the
fault.
1 Prepurge position
The prepurge position for one of the actuators / VSD is undefined. Check the settings of
index 01 for parameters 501 through 506. Change any settings that are undefined and
reset the fault.
2 Postpurge position
The postpurge position for one of the actuators / VSD is undefined. Check the settings of
index 02 for parameters 501 through 506. Change any settings that are undefined and
reset the fault.
3 Ignition position
The ignition position for one of the actuators / VSD is undefined. Enter commissioning
mode (parameter 400) and check the settings of P0. Change any settings that are
undefined and reset the fault.
72 Any # Internal error fuel-air ratio control If the fault occurs continuously, replace the LMV3.
73
Any #
Internal error fuel-air ratio control:
Position calculation multistep
Check curve points to see if correct values have been entered for all actuators and the VSD.
Readjust the ratio curve if required.
23 Output invalid
26 Curvepoints undefined
75
Any #
Internal error fuel-air ratio control: Data
clocking check
1) Set both parameter 123:00 and 123:01 to a 1 and reset the fault.
2) If the fault persists, and a VSD is present, restandardize the VSD and reset the fault.
3) If the fault occurs continuously, replace the LMV3.
1 Current output different
2 Target output different
4 Target positions different
6
Target output and target positions
different
16 Different positions reached
76 Any # Internal error fuel-air ratio control If the fault occurs continuously, replace the LMV3.
80
Any # Control range limitation of VSD A VSD speed error occurred. See diagnostics codes for more information.
1 Control range limitation at the bottom
This indicates that the LMV3 has decreased its signal to the VSD as much as possible and
the motor RPM is still too high.
1) Increase VSD / LMV3 ramp times.
2) Increase VSD braking if possible.
3) Ensure that the VSD and LMV3 are configured for the same analog signal (0-10 VDC).
4) Re-standardize the speed. Be sure to check combustion after the re- standardization.
2 Control range limitation at the top
This indicates that the LMV3 has increased its signal to the VSD as much as possible and
the motor RPM is still too low.
1) Increase VSD / LMV3 ramp times.
2) Check for filters, damping, or delays on the input signal to the VSD. The VSD should
respond to the input signal in a linear fashion.
3) Check speed sensor on motor for correct installation, especially the gap between the
81 1 Interrupt limitation speed input
The LMV3 has detected an interruption on the speed input. Decrease the electrical noise
on the speed sensor wires. If the fault occurs continuously, replace the LMV3.
Error
Code Diag. Code Description
Corrective Action
Note: Diagnostic codes are additive. If a diagnostic code appears that is not on this list, it is a combination of multiple diagnostic codes.