MASCOT MSTWW, Инструкция по установке и эксплуатации

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LAARS Heating Systems
Page 54
Display Condition Diagnostic Corrective Action(s)
FLAME FAULT
Occurs when flame
is
detected when there
should be no flame
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Burner may be operating too hot due to
incorrect combustion.
Check for flame at burner via flame current with
burner off. Turn off and watch flame through
observation port. If flame continues after
shutdown, replace gas valve.
BLDC Fan FAULT BLDC Fan is unable
to reach required
speed or 0 RPM
when it is turned off.
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Check wire harness for loose connections and
pin engagement at blower connections.
Water heater is in standby mode and fan is not
running. If FAN SPEED is not 0 RPM then
replace the fan.
IGNITION
FAULT
Even if water heater
went through 8
ignition attempts,
but cannot detect
flame.
Manual switch Power off
and on.
Visual inspection of flue ways often will not be
able to diagnose condition.
Check incoming gas pressure with water heater
off and at MAX fire. Adjust within limits on rating
plate.
Check for vent pipe and intake pipe restrictions
or blockage
Check burner fasteners and gaskets
Check air intake pipe and orifice
GAS VALVE
FAULT
The Control has
detected a problem
with its gas valve
output circuit
Reset using manual switch.
Reset screen on control
panel.
(Power button)
Check wire harness connections between gas
valve and Control.
If lockout reoccurs, replace Gas valve.
7.1 Diagnostics Section 7
–
Troubleshooting