LAARS MagnaTherm MGV - Installation, Operation and Maintenance Instructions - Manual (Page 87)

MagnaTherm Boilers and Water Heaters Page 83
Code Description Lockout
or Hold
Procedure
237 Invalid DHW (Domestic Hot Water)
connector type setting L
1. Return to Configuration mode and recheck
selected parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
238 Invalid Stack connector type setting L
1. Return to Configuration mode and recheck
selected parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
239 Invalid Header connector type setting L
1. Return to Configuration mode and recheck
selected parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
240 Invalid Outdoor connector type setting L
1. Return to Configuration mode and recheck
selected parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
12.3 Diagnostic Tests and Input/
Output Indicators
Two kinds of screens are grouped together in this
section:
• Detailed indications of the input and output
signals
• Diagnostic tests of the pumps and burner
modulation
Note that these functions apply to just one selected
controller.
To access the diagnostic functions, from the home
screen, touch the control icon, then touch the
‘Diagnostics’ button.
1. The buttons at the bottom of the screen select
the types of inputs and outputs displayed. The
Burner Control I/O button leads to Menu 36
Menu 36. Burner Control I/O Screen
A green dot indicates a function that is “on.”
2. Press the Digital I/O button to see parameters
with the functions that are either “on” or “off.”
See Menu 37.
Menu 37. Digital I/O Screen
3. The button for Analog I/O displays items that
change continuously between two limits. See
Menu 38