Operating instructions

31
Part Number 550-142-784/0812
GWA Series 2 Gas-Fired Water Boilers – Boiler Manual
11 Troubleshooting – spark-ignited pilot boilers
Control indicator lights —
HARD LOCKOUT Summary (Flashing LED’s)
MAY remove 120VAC power for more than 2 seconds to clear lockout OR
ignition control will automatically restart sequence of operation after 1 hour
waiting period after fault condition is cleared.
INDICATOR LIGHT CONDITION
POWER
Flashes once per second 120 VAC connection to boiler reversed.
Flash code 2* Internal fault, microprocessor or memory.
Flash code 3* Unused.
Flash code 4* Unused.
Flash code 5* Internal fault, water thermistors disagree.
Flash code 6* Internal fault, gas valve circuit.
* Flash code pattern: POWER LED ashes 2, 3, etc. times rapidly followed
by 2 seconds off, then repeats.
ALL LED’S FLASHING Failure to establish pilot ame
after 4 attempts. Follow Manual
(Propane Gas Only) Reset Procedure on page 19 to correct.
SOFT LOCKOUT Summary (Flashing LED’s)
MAY remove 120VAC power for more than 2 seconds, cycle thermostat for
between 2 and 20 seconds, OR ignition control will automatically restart
sequence of operation after 1 hour waiting period.
INDICATOR LIGHT CONDITION
POWER + TSTAT/CIRC High voltage detected on TSTAT circuit.
POWER + DAMPER Damper stuck closed or unable to close end
switch within 45 seconds from TSAT call.
POWER + FLAME Flame sensed without call for heat or out of
sequence during ignition trial.
CAUTION Summary (Flashing LED’s)
INDICATOR LIGHT CONDITION
DAMPER Damper end switch opened after it had been
proven closed.
LIMIT Fault detected in temperature sensing hardware.
FLAME Flame loss or ame not sensed during trial
for ignition.
Troubleshooting the control module
See Figure 17, page 32, for location of harness plug receptacles and plugs on
the control module.