Honeywell S7999D1048 Manual page 54

S7999D1048 COMBUSTION SYSTEM OPERATOR INTERFACE DISPLAY
Burner Control Locks Out Due to
Loss of Air Flow Switch
• The R7999 ControLinks™ controller has a preset of
25% air position/0% fuel for the initial lightoff point.
Depending on the air damper topology, this may not
provide enough airflow to maintain the air flow switch
and cause the burner control to lock out. The R7999
is still functional at this time even though the burner
control is locked out. Therefore, before resetting the
burner control and restarting the lightoff process, you
should first set a new temporary lightoff point to a
higher airflow value to prevent the air flow switch from
dropping out. The next time through the sequence,
the new higher lightoff point may allow the air flow
switch to be maintained or you will have to repeat the
process, i.e., move the lightoff point air value to a
more open value such that the new point can maintain
the air flow switch.
Purge Setting Beyond Maximum
Modulation Point
• A finished profile requires the purge position to be
lower than the maximum modulation. If you encounter
a condition where you are required to place the
maximum modulation point below the current purge
setting, you must first move the purge point to a lower
position. The purge position can be moved at any
time by reselecting the Air Purge button in the Save
Position command window.
R7999 Cannot Establish
Communications
• Beyond the difficulties associated with
communications polarity wiring errors, and lack of
power to the R7999, there are several subtle system
errors that preclude communications. All of the errors
are indicated by the green LED and red Lockout LED
being continuously "on." Fuel select problems after
power up are indicated with all LED's being "on"
continuously.
Fault/
Blink
Code
11 Device is operating properly.
13 MV input energized at an improper time.
14 HF and LF are energized at the same time.
15 Transition to the requested Burner Control input state
is not allowed from the current state. E.g., Standby to
Modulate is not allowed.
21 Internal Error – Time base.
65-0321—01
Table 7. Fault Codes and Corrective Actions.
Description
a. If no fuel select inputs are on, or both fuel selects are
made, you cannot establish communications with the
controller. The corrective action is to select one of
the fuels or remove one of the fuel select inputs.
b. R7999 is in a locked out state. The corrective action
is to first reset the control. If that does not work, you
must remove the fault.
Unable to Land on a Predefined Point
• Under unique actuator loading conditions, it may be
difficult to land on an existing programmed point. This
can occur while using the "Move Along the Curve"
command. it can also occur when you are completing
the curve verification process on extremely flat or
steep line segments as you reach the end of the
curve. If you are experiencing problems, back up from
the problem point at least 5 degrees, then move back
to the point using a
3-degree, 1-degree or 0.1-degree movement. This
should allow you to complete your curve verification or
land on a problem point for deletion.
Password no Longer Valid
• Bringing an R7999 to an unconfigured state utilizing
the S7999D wipes out the R7999 Commission
password and returns it to the "password" setting.
Enter a new password.
R7999 FAULT CODES AND
CORRECTIVE ACTIONS
The R7999 incorporates two methods to retrieve fault
information:
• Press and hold the reset button. The fault code is indicated
by the blinks of the LED. All codes are two digits. The 10's
digit is indicated by a series of slow blinks while the 1's digit
is indicated by a series of short blinks following the slow
ten's digit. For example, 64 is made up of six slow blinks
followed by four fast blinks. The cadence is repeated as long
as you hold the reset button. The device will not reset by the
action of the reset switch once it enters the flash mode. To
reset the R7999, push and release the reset button within
one second.
• Read the code directly from the Monitor screen of the
S7999D via the Show Faults buttons.
Corrective Action
Reset control. Check Burner Control Interface wiring and correct
error. This error causes the device to remain in initiate state at
power up.
Reset control. Check Burner Control Interface wiring and correct
error. This error causes the device to remain in initiate state at
power up.
Check wiring to burner control and/or burner control operation.
NOTE: Moving a RM78XX Run/Test switch to Test will
Induce this fault during commissioning mode.
a
Reset Control .
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