Patterson-Kelley MACH C1500, Инструкция по установке и эксплуатации

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MACH® Series Gas-Fired Boiler Maintenance
Page 32
5.5 T
ROUBLESHOOTING
WARNING
!
If any “Manual Reset” limit device trips,
DO NOT
reset without determining
and correcting the cause.
(Manual Reset Limits include: Flame safeguard,
high or low gas pressure, high temperature limit)
The MACH® C1500/C2000 boiler will display service
codes to indicate some problems with the boiler.
There are two types of lockouts that the control may
display. Each code will consist of a letter followed by
a two digit number. A code beginning with ‘E’
indicates a manual reset lockout requiring an operator
to press the reset button. A code beginning with a ‘b’
indicates an automatic reset lockout. The control will
automatically attempt to restart the boiler. A listing of
service codes is included in this section.
If the boiler displays an ‘E-code’ or recurring ‘b-code’,
call a qualified service technician to troubleshoot the
problem and implement corrective action.
The Loss of Power
In the event of a power failure (or when the On/Off
switch is in the Off position), the display panel is not
illuminated and the entire system is de-energized,
closing all automatic gas valves and halting all boiler
operations. When power is restored the boiler will
restart, provided that all the limits are satisfied. If any
manual reset lockout was present when the power is
lost, the display will flash
E 04 when the power is
resumed. This indicates that the control was in
lockout mode but does not indicate which service code
was present.
Loss of Water Level
The low water switch opens when there is insufficient
water level in the boiler.
E 12 is shown on the display,
and burner operation is interrupted. When the correct
water level is re-established, a manual reset is required
to restart the boiler, provided that all other limits are
satisfied.
Low Gas Pressure
The low gas pressure switch opens when there is
insufficient gas pressure available for proper operation
of the boiler;
E 12 is shown on the display, and burner
operation is interrupted. If a gas-supply shut-off valve
is closed for any reason, a low gas condition will
result.
When gas pressure is restored, E 12 will remain on the
display panel, and a manual reset is required to restart
the boiler, provided that all other limits are satisfied.
High Gas Pressure
The high gas pressure switch opens when there is
excessive gas pressure for the proper operation of the
boiler. An
E 12 service code is displayed and the
burner operation is interrupted.
When proper gas pressure is restored, E 12 remains on
the display with the boiler locked out until the front
display panel reset button is pressed.