62
xIII. TROUBLE SHOOTING (continued)
Possible
ERR
(Boiler Control Error) Values:
Err
Value Description
1
Temperature Sensor Fault
2
Communications Fault
3
Internal Hardware Fault
4
Burner Output (B1) Fault
5
Line Voltage Fault (< 80 Vac)
6
Fuse Missing
7
User Setting Lost, (reset to factory defaults)
8
Manual Reset Lockout (resettable)
Possible
STA
(status) Values:
sTa
Value Description
1
Standby
4
Pre-purge
6
Trial for Ignition
7
Carryover
8
Running
9
Post-Purge
10
Retry/Recycle Display
14
Hard Lockout
15
Waiting for Limit to Close
16
Flame Present Out of Sequence
17
Self Test
StA
Status (see Status Numbers)
bt
Boiler Temperature
SP
Operating Setpoint (Outdoor Reset)
HL
High Limit Setpoint
HdF
High Limit Differential
hr
Heat Request Status
dh
DHW Heat Request Status
CAD
Cad Cell Resistance (ohms)
run
Run Time Hours
CYC
Boiler Cycles
Err
Error (see Error Numbers)
Erp
External Device Error (see Error Numbers)
Operating Mode Parameters
Press “I” key on the control to
change from one parameter to the
next. Each setting will alternate
between display code (for
example
STA
) and value.
Figure 36: Boiler Control
User Interface
3. Control locks out after Trial For Ignition (TFI).
a. No oil to burner.
b. Shorted electrodes.
c. Nozzle clogged.
d. Airflow too high.
e. Ignitor module defective.
f. CAD cell defective.
g. Oil valve stuck open or closed.
Note: The Safety Monitoring Circuit (SMC) is
designed to provide lockout in the event of a
stuck or welded motor relay.
C. IQ OIL BOILER CONTROL
When a problem occurs with the boiler operation, the IQ
Control System easily provides specific, valuable information
to help resolve the issue quickly. The display on the Boiler
Control should be the first place to check, see Figure 36.
1. Error Code
"Err"
IS NOT
displayed on the Boiler
Control: This is one of two conditions that occur when
a problem arises. In this circumstance, the following
table can be used to determine the problem and
possible causes.
NOTICE
If flame is not established within 15 seconds of
oil valve actuation (known as Trial For Ignition
[TFI]) lockout will occur. Lockout is indicated
by a red LED solid-on located on the oil primary
control.
Hard Lockout will occur if the Oil Primary
Control locks-out three (3) times during a call
for heat. This is indicated by red light reset
button solid-on.
D.
BEFORE TROUBLESHOOTING
The following pages contain trouble shooting tables for
use in diagnosing control problems. When using these
tables the following should be kept in mind:
1. This information is only meant to be used by a
professional heating technician as an aid in diagnosing
boiler problems.
2. Where applicable, follow all precautions outlined in
Section IX, System Start-Up .
3. In general, these tables assume that there are no loose
or miswired electrical connections. Before using these
tables inspect all electrical connections on the boiler to
