LAARS Heating Systems
Page 88
12.B Troubleshooting Table
This table includes a listing of the fault codes that may be displayed. Some of these can be corrected by
changing a parameter, while other conditions are more complicated, and will require a service technician.
The first column lists the code number that will appear at the beginning of the Lockout or Hold message in
the orange bar at the bottom of the screen. The second column lists the text as it will appear on the Touch
Screen. The third column shows whether the condition will cause a Hold, or Lockout, or both. The fourth
column lists some suggestions for corrective action.
Code Description
Lockout
or Hold
Procedure
1
Unconfigured safety data
L
1. New device, complete device configuration and
safety verification.
2. If fault repeats, replace module
2
Waiting for safety
data verification
L
1. Device in Configuration mode and safety
parameters need verification and a device
needs reset to complete verification.
2. Configuration ended without verification, re
enter configuration, verify safety parameters
and reset device to complete verification.
3. If fault repeats, replace module.
3
Internal fault:
Hardware fault
H
Internal fault
1. Reset module
2. If fault repeats, replace module.
4
Internal fault:
Safety Relay key feedback error
H
5
Internal fault:
Unstable power (DC DC) output
H
6
Internal fault:
Invalid processor clock
H
7
Internal fault:
Safety relay drive error
H
8
Internal fault:
Zero crossing not detected
H
9
Internal fault:
Flame bias out of range
H
10
Internal fault:
Invalid burner control state
L
11
Internal fault:
Invalid burner control state flag
L
12
Internal fault:
Safety relay drive cap short
H
13
Internal fault:
PII (Pre-Ignition Interlock) shorted to ILK
(Interlock)
H or L
15
Internal fault:
Safety relay test failed due to feedback ON
L
