PEERLESS Stainless Steel Gas Boilers Installation, Operation & Maintenance Manual page 29

7. Air Pressure Switch Fault Stuck Open – 8 PULSES
If the control senses the blower pressure switch is not
closed during the pre-purge cycle, the control will
attempt two additional pre-purge trials. If after three
pre-purge trials the control is still sensing the blower
pressure switch is not closing, the control will enter the
lockout state.
a. Check that the blower motor is off and verify that
the blower air pressure switch is functional. This
may require turning the screw in the center of the
air pressure switch in 1/4 turn counter-clockwise to
correct (initial set-up only).
b. After any air pressure switch adjustment, you must
cycle the appliance several times to insure proper
operation.
8. Redundant Gas Valve/Gas Valve Relay Stuck ON – 9
PULSES
If the controller senses the redundant gas valve or the
gas valve relay is stuck ON it will go into the lockout
state.
a. Check for short-circuit(s) from the 24VAC and no
continuity between CN4 pins 3 and 4.
b. If the problem persists, replace the control board.
9. Redundant Gas Valve/Gas Valve Relay Stuck OFF –
10 PULSES
If the controller senses the redundant gas valve or the
gas valve relay is stuck OFF, it will go into a lockout
state.
Replace the control board.
TROUBLESHOOTING
10.Gas Valve NOT Connected – 11 PULSES
If the controller detects that the gas valve is not
connected it will go into the lockout state.
Check the connection to the gas valve.
11.ROM Checksum Failure – 12 PULSES
If the controller detects that the ROM check has failed
then it will go into a lockout state.
a. Turn the 120V power OFF then ON.
b. If the problem persists, replace the control board.
12.RAM Test Failure – 13 PULSES
If the controller detects that the RAM test failed it will
go into a lockout state.
a. Turn the 120V power OFF then ON.
b. If the problem persists, replace the control board.
13.60 Hz Failure – 14 PULSES
If the generator, inverter, or other power source does
not provide 60Hz, then the power source must be
replaced.
a. If the power source used supplies 60Hz, turn the
120V power OFF then ON.
b. If the problem persists, replace the control board.
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