Honeywell S7999B, Manual

Page: 61 / 76

S7999B SYSTEM DISPLAY
61 65-0283—2
Table 7. Fault Codes and Corrective Actions.
Fault/
Blink
Code Description Corrective Action
11 Device is operating properly.
13 MV input energized at an improper time. Reset control. Check Burner Control Interface wiring and correct
error. This error causes the device to remain in initiate state at
power up.
14 HF and LF are energized at the same time. Reset control. Check Burner Control Interface wiring and correct
error. This error causes the device to remain in initiate state at
power up.
15 Transition to the requested Burner Control input state
is not allowed from the current state. E.g., Standby to
Modulate is not allowed.
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.
21 Internal Error – Time base. Reset Control
a
.
22 Internal Error – KEY decode. Reset Control
a
.
23 Internal Error – Rdlow. Reset Control
a
.
24 Internal Error – Time storage.
Reset Control
a
.
25 Internal Error – Limited move.
Reset Control
a,c
.
26 Internal Error – Targeted move.
Reset Control
a,c
.
27 Internal Error – LVD.
Reset Control
a
.
28 Internal Error – ISR check.
Reset Control
a
.
31 Internal Fault – A2D Range.
Reset Control
a
.
32 Internal Fault – A2D Matching.
Reset Control
a
.
33 Internal Fault – LCO Drive.
Reset Control
b
.
34 Internal Fault – LCO/I Feedback.
1.) Reset Control
b
. Check actuator wiring. See Channel LED for
actuator.
2.) Terminal 14 has voltage present from an external source,
correct wiring problem.
3.)
d
.
35 Internal Fault – Commanded State.
Reset Control
a
.
36 Fuel Selection Problem. Check wiring through fuel select switch, at least one fuel must be
selected at any given time (not zero, not two).
37 Fault HFP or LFP output. Verify correct wiring to burner control. Specifically check wiring
at LFP and HFP.
38 Internal Fault – memory curve.
Reset control
a
.
39 Internal Fault – AC sampling .
Reset control
b
.
41 Feedback potentiometer Interface circuit fault—Air.
Verify correct wiring of Potentiometer
a
.
42 Feedback potentiometer Interface circuit fault—Fuel 1. Verify correct wiring of Potentiometer
a
.
43 Feedback potentiometer Interface circuit fault—Fuel 2. Verify correct wiring of Potentiometer
a
.
44 Feedback potentiometer Interface circuit fault – FGR. Verify correct wiring of Potentiometer a
.
45 Feedback potentiometer wiper resistance problem, Air. Check for loose potentiometer wiring
a,c
.
46 Feedback potentiometer wiper resistance problem,
Fuel 1.
Check for loose potentiometer wiring
a,c
.
47 Feedback potentiometer wiper resistance problem,
Fuel 2.
Check for loose potentiometer wiring
a,c
.
48 Feedback potentiometer wiper resistance problem,
FGR.
Check for loose potentiometer wiring
a,c
.
49 Feedback potentiometer total resistance problem, Air. Check for loose potentiometer wiring
a,c
.