LAARS NeoTherm NTV (Sizes 150–850 MBTU/h) - Install and Operating Manual - Manual (Page 83)

Page 79 N eo T herm Boilers and Water heaters
63 LCI (Limit Control Input) OFF
(Safety Chain Open) H 1. Check wiring and correct any faults.
2. Check Interlocks connected to the LCI to assure proper function.
3. Reset and sequence the module; monitor the LCI status.
4. If code persists, replace the module
64 PII (Pre-Ignition Interlock) OFF H or L 1. Check wiring and correct any faults.
2. Check Preignition Interlock switches to assure proper functioning.
3. Check the valve operation.
4. Reset and sequence the module; monitor the PII status.
5. If code persists, replace the module.
67 ILK (Interlock) OFF H or L 1. Check wiring and correct any possible shorts.
2. Check Interlock (ILK) switches to assure proper function.
3. Verify voltage through the interlock string to the interlock input with
a voltmeter.
4. If steps 1-3 are correct and the fault persists, replace the module.
68 ILK (Interlock) ON H or L 1. Check wiring and correct any possible shorts.
2. Check Interlock (ILK) switches to assure proper function.
3. Verify voltage through the interlock string to the interlock input with
a voltmeter.
4. If steps 1-3 are correct and the fault persists, replace the module.
70 Wait for leakage test completion H 1. Internal Fault. Reset module.
2. If fault repeats, replace module.
78 Demand Lost in Run H 1. Check wiring and correct any possible errors.
2. If previous steps are correct and fault persists, replace the module.
79 Outlet high limit H or L 1. Check wiring and correct any possible errors.
2. Replace the outlet high limit.
3. If previous steps are correct and fault persists, replace the module.
80 DHW (Domestic Hot Water) high
limit
H or L 1. Check wiring and correct any possible errors.
2. Replace the DHW high limit.
3. If previous steps are correct and fault persists, replace the module.
81 Delta T limit H or L 1. Check inlet and outlet sensors and pump circuits for proper
operation.
2. Recheck the Delta T Limit to confirm proper setting.
3. If previous steps are correct and fault persists, replace the module.
82 Stack limit H or L 1. Check wiring and correct any possible errors.
2. Replace the Stack high limit.
3. If previous steps are correct and fault persists, replace the module.
91 Inlet sensor fault H 1. Check wiring and correct any possible errors.
2. Replace the Inlet sensor.
3. If previous steps are correct and fault persists, replace the module.
92 Outlet sensor fault H 1. Check wiring and correct any possible errors.
2. Replace the Outlet sensor.
3. If previous steps are correct and fault persists, replace the module.
93 DHW (Domestic Hot Water)
sensor fault
H 1. Check wiring and correct any possible errors.
2. Replace the DHW sensor.
3. If previous steps are correct and fault persists, replace the module.
Code Description L or H Procedure