Install Instructions

45
X. TROUBLESHOOTING
A. 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, perform startup checks and
adjustments outlined in Section VIII ‘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 make sure that they are tight. Also,
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.
check the wiring on the boiler against the wiring
diagram in Figures 17 and 18. Ensure that incoming
120 Vac power polarity is correct and that the boiler
is properly grounded. Further, ensure that the control
power supply is 24 VAC (minimum 18 VAC to
maximum 30 VAC) and polarity is correct.
4. All controls on the boiler are tested at least once in
the manufacturing process and a defective control
or component is generally the least likely cause.
Before replacing a component, try to rule out all
other possible causes.
5. When checking voltage across wiring harness pins
be careful not to insert the meter probes into the
pins. Doing so may damage the pin, resulting in a
loose connection when the harness is reconnected.
When Err (error) is shown:
Value Description
2 Pressure Switch Failed to Open
4 Flame current lower than threshold
6 Flame Out of Normal Sequence
18 Electronics Failure
23 Flame Sensed During Pre-purge
29 Pressure Switch Failed to Close
32 Temperature Sensor Failure
35 Duplicate Zone Alarm
57 Flame Rod Shorted to Ground
58 AC Line Frequency
59 Line Voltage Error
60 Thermostat input higher than threshold
61 Line Voltage Unstable
63 Soft Lockout – Recycles Exceeded
64 Soft Lockout – Internal Failure
Possible STA (status) values:
Value Description
1 Standby
2 Waiting for Pressure Switch to Open
3 Waiting for Pressure Switch to Close
4 Pre-purge
6 Spark
7 Flame Proving
8 Running
10 Retry/Recycle Delay
11 Pressure Switch Failed to Open
12 Pressure Switch Failed to Close
13 Soft Lockout
14 Hard Lockout
15 Waiting for Limit to Close
16 Flame Present Out of Sequence
17 Self Test