Laars MagnaTherm MGH1600 Installation And Operation Instructions For page 95

MagnaTherm Boilers and Water Heaters
79 Outlet high limit
80 DHW (Domestic Hot Water) high limit
81 Delta T limit
82 Stack limit
91 Inlet sensor fault
92 Outlet sensor fault
93 DHW (Domestic Hot Water) sensor fault
94 Header sensor fault
95 Stack sensor fault
96 Outdoor sensor fault
97 Internal Fault: A2D mismatch.
98 Internal Fault: Exceeded VSNSR
voltage tolerance
99 Internal Fault: Exceeded 28V voltage
tolerance
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.
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.
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.
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.
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.
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.
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.
H 1. Check wiring and correct any possible errors.
2. Replace the header sensor.
3. If previous steps are correct and fault persists,
replace the module.
H 1. Check wiring and correct any possible errors.
2. Replace the stack sensor.
3. If previous steps are correct and fault persists,
replace the module.
H 1. Check wiring and correct any possible errors.
2. Replace the outdoor sensor.
3. If previous steps are correct and fault persists,
replace the module.
L
Internal Fault.
L
1. Reset module.
L 2. If fault repeats, replace module.
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