R7999C CONTROLINKS™ CONTROLLER
32-00081EF—01
14
a
It is possible that a random external electrical noise has caused a fault checking algorithm to be detected. Resetting the
control will allow recalculation of the fault and, if it is not a hard failure, the device will continue to operate. If the condition
will not clear, the device must be replaced.
b
Check ac waveform; severe noise on ac lines can corrupt sampling of ac signals.
c
Verify actuator total resistance and wiper measurements; check the ability of the actuator to travel full stroke using the
manual override buttons in the actuator. Verify input power to the actuator. if actuator is not functioning, replace the actu-
ator.
d
Conditional Alarm. Causes the alarm output to be energized, the system may still be operating but requires attention in
order to modulate or to proceed with the light off sequence. The actuators would be positioned at lightoff point, minimum
modulation point or maximum modulation point, dependent on what the particular fault is and when the fault is intro-
duced, relative to the R7999C ControLinks operating state.
Wiring Checkout and Error Faults
The ZM7999 commissioning, a S7999 touchscreen display,
or other monitoring tools provide an effective means of an
indirect status reading of all line voltage inputs and
outputs. Use these tools to confirm wiring. The
commissioning tool and monitoring tool environments
require that a single fuel select input to be active before
proceeding with communications between the tool and
controller. Further, simultaneous HF and LF commands
from the burner are not allowed and will preclude
communications with the tools.
The act of bringing actuators successfully “on-line” verifies
the initial wiring between the controller and actuators. See
error codes 71 through 74 and/or 54 through 57 for
details. Other wiring problems occurring between the
actuators and controller, after commissioning, may be
annunciated by fault codes 41 through 53 or 61,67,68,69
or 82 through 86.
Burner control wiring interface problems are annunciated
by fault codes 13, 14, 15, 34, 37.
The Q7999 Universal Subbase is partitioned into a line
voltage section and a low voltage section. Utilize shielded
cabling on all low voltage wiring. Keep the earth ground
cable shield short as possible for all interface wiring as
illustrated in Fig. 2.
Replacing an ML Actuator
When the ML7999C Actuator is identified for replacement,
you should do the following BEFORE the actuator is
removed:
1.
Use the ZM software or the S7999 Touchscreen Dis-
play and make sure the burner configuration has
been saved.
2.
Go into the Commission and go to the Actuator that
needs to be replaced, and Unlock at least one of the
endpoints.
3.
Remove the wiring and actuator and install the
replacement without tightening the setscrews (as
described in the ML instructions).
4.
You can now go back through the commission proce-
dure to set up the new actuator by entering the serial
number and establish the end points.
5.
Once entered, you can download the existing curve
and verify the curve firing points.
If the motor had been removed and is now added to the
R7999C system, the R7999C will lockout because the
motor serial numbers won’t match.
1.
Make sure the system is in “Standby”
2.
Go to the replaced actuator and remove the cover,
above the wiring about the center of the motor is a
Red connector. Carefully disconnect it.
3.
Go back into the Commission mode of the ZM soft-
ware or S7999 Touchscreen display and enter your
password, but DO NOT press enter.
91
The 4 to 20 mA firing rate input is below 3 mA, Out of Range—Low. (Actuators
return to or remain at the minimum modulation point with the alarm on; the
control remains operational only to the extent that Minimum Modulation
firing operation is allowed.)
Check CmA+-input (Terminals 39 and 40) for proper operation polarity and
range. The input must be within 3.0 mA to 21.0 mA. The voltage at this
terminal must be within 0.7 to 5.0 Vdc, respectively.
Conditional Alarm—Alarm output is energized; controller continues to run.
92
The manual potentiometer rate input is higher than an allowable range, i.e.,
Out of Range—High. (The actuators move to the maximum modulation point
with alarm ON, control will remain operable, yet when MANUAL MODE is
selected, maximum modulation and alarm output shall occur.) Auto mode
operation is not affected.
The Manual potentiometer is out of range high. Make sure a 5000 ohm
(±10%) potentiometer is being used and wiring to it is correct. Shielded cable
is recommended.
Conditional Alarm—Alarm output is energized; controller continues to run.
d
93
The auxiliary 4-20 mA input must be below 3.0 mA when configured for use.
(The actuators return or remain at the minimum modulation point with alarm
ON, the control will remain operable only to the extent that Minimum
Modulation firing operation is allowed.)
Check XmA+- input (Terminals 37and 38) for proper operation polarity and
range. The input must be within 3.0 mA to 21.0 mA. The voltage at this
terminal must be within 0.7 to 5.0 Vdc respectively.
Conditional Alarm—Alarm output is energized; controller continues to run.
d
94
After LCO is set by the R7999C, the Burner Control must provide a Lightoff or
Purge request within 20 seconds. (Controller remains in a processing demand
condition indefinitely waiting for valid inputs on the LF, MV and HF inputs; the
alarm is sounded after the 20-second period expires.)
Check burner control interface wiring and burner control operation
(Terminals 10, 11, 12). The R7999C is waiting for a command via these
terminals.
Conditional Alarm—Alarm output is energized; controller continues to run.
d
Table 7. Fault Listings and Descriptions. (Continued)
Fault/
Blink
Code
Description
Corrective Action
