Laars NEOTHERM NTV, Service Manual, Page: 99 / 118

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Service Manual - NeoTherm 500
App1
Appendix 1 - Error Codes
This table includes a listing of the faults that might be generated by the controllers, and displayed on the Operator Interface. Some
of these can be corrected by an installer 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 Operator Interface. 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 L or H 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 Internal fault
1. Reset module
2. If fault repeats, replace module.
5 Internal fault:
Unstable power (DC) output H Internal fault
1. Reset module
2. If fault repeats, replace module.
6 Internal fault:
Invalid processor clock
H Internal fault
1. Reset module
2. If fault repeats, replace module.
7 Internal fault:
Safety relay drive error H Internal fault
1. Reset module
2. If fault repeats, replace module.
8 Internal fault:
Zero crossing not detected H Internal fault
1. Reset module
2. If fault repeats, replace module.
9 Internal fault:
Flame bias out of range H Internal fault
1. Reset module
2. If fault repeats, replace module.
10 Internal fault:
Invalid burner control state L Internal fault
1. Reset module
2. If fault repeats, replace module.