Laars MagnaTherm HTD Series Installation And Operation Instructions Manual page 126

Page 122
Error Diag.
Code Code
Note: Diagnostic codes are additive. If a diagnostic code appears that is not on this list, it is a combination of multiple diagnostic codes.
82 1 Timeout of standardization (VSD ramp down time too long)
2 Storage of standardized speed not successful
3 Line interruption speed sensor
Speed variation / VSD ramp up time too long / speed below minimum limit
4
for standardization
82
5 Wrong direction of rotation
6 Unplausible sensor signals
7 Invalid standardized speed
15 Speed deviation µC1 + µC2
20 Wrong phase of phase manager
21 Safety loop / burner flange open
22 Air actuator not referenced
23 VSD deactivated
82
24 No valid operation mode
25 Pneumatic air-fuel ratio control
128 Running command with no preceding standardization
255 No standardized speed available
Any # Speed error VSD
0 Speed error when trim function is active
1 Lower control range limitation of control
2 Upper control range limitation of control
4 Interruption via disturbance pulses
8 Curve too steep in terms of ramp speed
83
Meaning for the LMV3
LAARS Heating Systems
Corrective Action
Standardization timed out because the VSD took too long to ramp down
at the end of the standardization. Either decrease the ramp down time in
the VSD or increase the setting of parameter 523.
Press the info button with any other button to cause a manual lockout,
then reset the fault and attempt to standardize again.
No pulses from the speed sensor were detected during standardization.
1) Verify that the motor is rotating.
2) Check the wiring between the speed sensor and the LMV3.
3) Check and / or adjust the gap between the speed wheel and the
sensor. The gap should be about 1/16" (2mm), or about two turns away
from the speed wheel.
A stable speed was not reached after ramping up the VSD, so a
standardized speed could not be determined.
1) Either decrease the ramp up time in the VSD or increase the setting of
parameter 522.
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) Ensure that the VSD and LMV3 are configured for the same analog
signal (0-10 VDC).
1) Check to see if the motor's direction of rotation is correct. Reverse if
necesssary.
2) Check to see if the arrow on the speed wheel points in the correct
direction of rotation. Reverse if necessary.
1) Check the setting of parameter 643 and ensure it is set correctly. For
VSD + 3-phase motor, this should be a 0. For most brushless DC blowers,
this should be a 1.
2) Check and / or adjust the gap between the speed wheel and the
sensor. The gap should be about 1/16" (2mm), or about two turns away
from the speed wheel.
3) Check the wiring of the speed sensor. Ensure the reference ground is
properly connected.
4) Ensure that other metal parts besides the speed wheel are not being
picked up by the sensor when the motor rotates.
The standardized speed measured does not lie in the permissible range
(650-14,000 RPM).
Reset the fault and repeat the standardization.
Standardization must be performed in standby (phase 12).
Fix any conditions causing a limit in the safety loop / burner flange circuit
to be open, then attempt to standardize again.
Typically caused by trying to standardize while the air actuator is currently
referencing. Wait for the actuator to finish referencing and try to
standardize again. If the fault persists, see error code 85, diagnostic code
1 for additional troubleshooting.
The VSD must be activated before standardization can be performed. Set
parameter 542 to a 1 and attempt to standardize again.
A fuel train must be selected before standardization can be performed.
Select a fuel train via parameter 201 (fuel 0) or 301 (fuel 1), then attempt
to standardize again.
Standardization cannot be performed when using a pneumatic fuel train.
Select a different fuel train via parameter 201 (fuel 0) or 301 (fuel 1), then
attempt to standardize again.
A call for heat was received and the VSD is activated (parameter 542 = 1),
but no standardization has been performed. Perform a standardization
by setting parameter 641 to a 1 while in standby phase 12, or deactivate
the VSD by setting parameter 542 to 0.
Perform a standardization via parameter 641 while in standby (phase 12).
A VSD speed error occurred. See diagnostics codes for more information.
Increase parameter 662 (neutral zone) and 663 (near zone) or deactivate
VSD trim via parameter 530.
See error code 80, diagnostic code 1.
See error code 80, diagnostic code 2.
See error code 81, diagnostic code 1.
See error code 84.