Empire Comfort Systems DVP20MS, Инструкция по установке и руководство пользователя, Страница: 44 / 68

42603-4-0421 Page 44
INTERMITTENT CONTROL SYSTEM TROUBLESHOOTING
1
If the DFC giving signal lock out:
The board should be unlocked to
reinitiate a pilot flame ignition (for
the correct unlock sequence refer
to the DFC Use and Installation
Instructions).
Is the DFC board in
lock out?
1. Verify the electrical connections’ integrity and
make sure they are in accordance with the relevant
system wiring diagram. If necessary replace the
wire harness.
2. Replace the DFC board.
Was observed spark
at the Pilot Hood
before the DFC
board locked out?
1. Check the spark electrode positioning - adjust
as necessary.
2. Replace the pilot assembly.
3. Verify the electrical connections’ integrity and
make sure they are in accordance with the
relevant system wiring diagram. If necessary
replace the wire harness.
4. Replace the DFC board.
1. Verify the electrical connections’ integrity and
make sure they are in accordance with the
relevant system wiring diagram. If necessary
replace the wire harness.
2. If pilot flow adjuster screw is not sealed:
Check if pilot flow adjust screw is set correctly in
accordance with the appliance manufacturer
instructions. If necessary correct it.
3. Replace pilot tube or complete pilot
assembly.
4. Replace the pilot orifice with a new orifice of
correct size, and type, or replace the pilot
assembly. Under all circumstances follow the
appliance manufacturer’s service instructions.
5. Remove the provided wiring harnesses from
Ev1 of gas valve (red base), and verify voltage at
ignition between the Ev1 terminal and the ground
connection on teh valve body. If the voltage is
greater than 0 then Replace Valve. Otherwise
Replace DFC.
Spark continues
while the pilot is ON.
2
1. Replace the pilot assembly.
2. Replace the DFC board.
NO NO
YES
NO
YES
YES
YES
NO