Purging the Heating Loop
Purging the Heating Loop
©Aqua-Hot®
125DN Installation Manual
REV 220419
©Aqua-Hot®
125DN Installation Manual
REV 220419
p. 47
p. 46
Fuel Purge Procedure:
The fuel lines should be automatically primed with the first
operation of the burner. It may need to be power cycled a few
times (3-4 times) to purge any air. Perform this procedure once
the burner and Aqua-Hot are completely installed and the Aqua-
Hot is adequately filled and purged.
1. Connect a 6V power source to the fuel pump to pulse
the pump. The power source must be able to be pulsed
(turned on and off) rapidly, for this process.
• The pump can be powered with wire and gator
clips.
• The pump pin numbers can be found on the inside
of the housing where the pins are found.
• Ground goes to Pin #1
• Power goes to Pin #2
• If you would rather use a plug instead of the wire
and gator clips, the mating part numbers needed
for the connector are:
○ Housing: 1-967644-1
○ Terminal; 0965906-1
○ Seal: 0-967067-1
2. Pulse the fuel pump at a steady 1-2 pulses per second
until fuel begins to come out of the fuel line where it
will connect to the burner.
3. Connect the fuel line to the burner.
4.
Ensure all hose clamps and fuel fittings are tight and
properly secured.
5. Ensure that the exhaust is well ventilated.
6. Turn the burner to ON at the screen (see Figure 98).
The burner should cycle on because of the primed fuel
lines.
• There may be smoke from the exhaust on initial
start-up, this is normal.
7.
If the burner does not cycle on with the first start up, it
will try a second time.
• If the second start-up fails, there will be a fault
message on the LCD screen (Figure 99). Tap the
burner OFF at the screen.
• Repeat Step 6.
• If fault occurs again, repeat Steps 4-6.
8. After a successful start up, run the burner for 5
minutes.
9. After running the burner for 5 minutes, tap the HIGH
ALTITUDE option on the LCD screen (see Figure 100)
and run for additional 2 minutes.
After a complete, successful first operation, the fuel lines should
be purged of any air and ready for normal operation and use.
Fuel System Purge
Figure 98
Figure 99
Figure 100
Fuel Pump Pins
Figure 97
1 2
Do NOT exceed 6V when powering the fuel pump. This can
cause irreparable damage to the fuel pump.
NOTE:
DO
NOT
run the diesel burner without the coolant filled
and purged as it will cause serious damage to the burner.
External Diesel Burner Troubleshooting
This section will cover any issues with the external diesel burner. The diesel burner is the primary heat source to the 125GN.
The troubleshooting procedures listed below are arranged in order of repair complexity. Do not replace parts without correctly
determining the failure.
Follow the directions below in order to troubleshoot the diesel burner. Do not skip through the troubleshooting steps, as this
may needlessly complicate unit diagnosis and repair.
Troubleshooting Procedure:
• Ensure that the system is supplied with electrical power and there are no blown fuses.
•
Ensure that there is at least ¼ tank of fuel in the vehicle fuel supply and the fuel filter is not clogged.
• Make sure all the electrical and plumbing connections are connected and secure.
• Ensure there are no faults for the burner. If there are, determine the fault and remedy.
The fault is indicated by a flashing “fault” light on the LCD screen during heater operation. It is indicated on the diagnostic screen
by the Burner Status ON/OFF indicator. There will be a series of rapid flashed, followed by 1 or more slow flashes. The rapid flashes
are an alert indicator; the slow flashes should be counted, as that is the fault code. Refer to the table below for the fault code.
FO1 (1 flash)
No start (after 2 attempts to start
FO2 (2 flashes)
Flame failure
F03 (3 flashes)
Under-voltage or over-voltage
F04 (4 flashes)
Premature flame recognition
F05 (5 flashes)
Not used
F06 (6 flashes)
Coolant temperature sensor interrupt or
temperature sensor short-circuit
F07 (7 flashes)
Fuel pump interrupt or short-circuited
F08 (8 flashes)
Combustion air fan motor interrupt or blower
motor short-circuit or incorrect speed
F09 (9 flashes)
Flame sensor interrupt or short-circuit
F10 (10 flashes)
Overheating
F11 (11 flashes)
Circulating pump interrupt or short-circuit
F12 (12 flashes)
Battery main switch short-circuit
F13 (13 flashes)
Output vehicle fan short-circuit
F14 (14 flashes)
Overheating sensor defective
F15 (15 flashes)
Pre-heating/ignition circuit defective
F16 (16 flashes)
Exhaust gas temperature too high
F17 (17 flashes)
Exhaust gas temperature sensor defective
After 5 short signals, count the long flashes:
F00 (continuous
flashing)
Burner interlock (lock-out
After the fault cause has been eliminated, the burner must be
switched on again.
Heater Lock-out Reset Procedure
The control unit continuously monitors the heater operation.
The control unit identifies errors on individual burner com
-
ponents and faults during operation. Should the control unit
experience component errors and operational faults, the
burner may be shut down and not restart.
The burner lockout reset must be done manually as shown
below.
Troubleshooting Procedure:
• Turn on the burner on the interior switch.
• Remove the main power connection to the burner or pull
the fuse for a minimum of 20 seconds.
• Turn the burner off on the switch.
• Reconnect the main power connection that was previously
disconnected.
External Diesel
Burner
Figure 101
Burner Troubleshooting
Содержание AHE-125-DN1
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