68
LP- 446 REV. 9.3.14
Fault Code F16
APS CLOSED F16
Flapper valve stuck closed.
1. Check flue system for obstructions.
2. Check proper communication between boilers.
3. Check operation of flapper valve.
4. Check wiring between valve and controller.
5. Replace valve-flapper.
Fault Code F20
CONDENSATE FULL F20
PUMP ON
The condensate trap is full. The red light will
display and the word LOCKOUT will flash. This
code indicates a serious safety issue. The
heater will not restart until the cause is
determined by a technician and he pushes the
RESET button on the display. During this
lockout fault, the pump will be off as indicated
on the second line of the display.
1. Check condensate lines for obstructions.
2. Check float switch in condensate reservoir.
3. Check wiring from condensate reservoir to 926 control and repair
as necessary.
Fault Code F31
PROGRAM ERROR F31
There was an error while programming the control and
the memory is corrupt. The heater control will not
function in this state and the pump will be off as
indicated on the bottom line. This error only occurs if a
technician is programming the control and the
programming function fails. The only way to recover
from this error is to reprogram the control. If this error
occurs at any time other than when a technician is
servicing the heater, the control has failed and must be
replaced by a qualified technician.
The control must be re-programmed. If programming does
not solve problem, the control must be replaced.
Fault Code PP
CONTROL PROGRAMED PP
The control has been programmed by a
technician or the factory. After programming,
the control is left in a locked out mode.
Press the RESET key for at least 1 second to begin use of the
control.
Fault Code FL
LOW WATER FLOW FL
PUMP OFF
This display indicates that there is low water
flow in the heater. This code will display on
VWH products only. This code resets automat-
ically when water flow is high enough for the
heater to run safely. The second line indicates
the status of the pump. The pump should
always be on when this code is displayed.
When there is a demand, the control will start
the pump, wait for the flow switch to indicate
flow then try to ignite the heater. This display
occurs after the pump is energized for several
seconds and the flow is still too low.
1. Check to see if heater pump is functioning. Repair as necessary.
2. Be sure water is flowing in the system. Check for valves that
should be open, plugged filter screens, etc.
3. Check the flow switch and wiring. Repair as necessary.
The following blocking codes will block operation until the control determines the situation safe for heater operation.
Blocking Code E07
FLUE TEMP HIGH E07
PUMP OFF TIME
This display indicates that the flue sensor tem-
perature is excessive and above 210
o
F. When
this code is displayed, the heater will not
respond to a demand for heat. When the flue
temperature decreases below 194
o
F, the
display will return to normal and allow the
heater to respond for a demand to heat. The
bottom line indicates the status of the pump.
The pump will remain off when this error is
displayed.
Check the flue for obstructions or any sign of damage, especially
signs of excessive heat. Repair as necessary. Run the heater and
check the flue temperature with an external thermometer. If the flue
temperature on the thermometer does not agree with the flue
temperature displayed in the status menu, inspect the wiring to the
flue temperature sensor in the heater and repair as necessary. If the
wiring is intact, replace the flue sensor. If the flue temperature is
excessive on the status menu and the test thermometer reads the
same, check and adjust combustion controls on the heater. If the
problem persists, inspect the target wall in the combustion chamber
and replace it if cracked or damaged.
Blocking Code E16
COMMON FLUE BLOCK
E16
Common flue blocking or flapper valve
feedback failure.
1. Check flue system for obstructions.
2. Check proper communication between boilers.
3. Check operation of flapper valve.
4. Check wiring between valve and controller.
5. Replace valve-flapper.
Blocking Code E19
LINE VOLTAGE
PUMP OFF E19
This display indicates that the line voltage fre-
quency is out of range. This could happen if the
heater is being powered from a small gasoline
powered generator that is not functioning cor-
rectly or overloaded.
Inspect power wiring to heater and repair as necessary. If
connected to line voltage, notify the power company. If connected to
an alternate power source such as generator or inverter, make sure
the line voltage frequency supplied by the device is 60 Hz.
Table 27
– Heater Error and Fault Codes
Содержание 500 HL
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