Operating instructions

Part number 550-141-887/0800
39
AHE Series 4 Direct Vent Wall-Mounted Boilers — Boiler Manual
Troubleshooting — charts continued 12d
CHART 5 — FLAME & POWER lights flashing
Electrical shock hazard — Wherever you see ▲TURN OFF POWER▲, follow the instructions. Failure to follow
instructions could result in severe personal injury, death or substantial property damage.
• Boiler should now operate normally.
• Original flashing FLAME light caused by igniter not
operating properly.
• See normal sequence of operation, Figure 17, page 22.
• Open manual gas valve.
• Restart boiler, following Operating instructions for gas
valve installed on boiler (pages 24 or 25).
• Check for proper operation (per Sequence of operation,
Figure 17, page 22).
• Boiler should now operate normally.
• Original flashing FLAME light caused by gas valve not
operating properly.
• See normal sequence of operation, Figure 17, page 22.
Call your local Weil-McLain
sales representative.
• Check and/or replace gas valve.
• Recycle boiler by thermostat or service switch.
Thermostat should call for heat and appropriate zone
valves close.
• Wait 5 minutes.
Are FLAME & POWER lights flashing?
No Yes
• Check and/or replace igniter.
• Recycle boiler by thermostat or service switch.
Thermostat should call for heat and appropriate zone
valves close.
• Wait 5 minutes.
Are FLAME & POWER lights flashing?
No Yes
• Check gas valve harness wires and check for tight wiring
connections on gas valve and control module. Repair/
replace as necessary.
• Recycle boiler by thermostat or service switch (holding
power off for at least 45 seconds).
• Thermostat should call for heat and appropriate zone
valves close.
During step 5 of sequence of operation (Figure 17, page
22), is there 24 VAC across gas valve terminals?
No Yes
Are manual main shutoff valve and gas valve turned on?
No Yes
• Replace control module.
• Retest.