AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 124)

Appendix B
Benchmark 2.0LN Low NOx Boiler
GF-123
Display Messages Installation, Operation and Maintenance Manual OMM-0046_0E
Page 124 of 170 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 08/20/12
Table B-2: Fault Messages
FAULT MESSAGE FAULT DESCRIPTION
AIRFLOW FAULT
DURING PURGE The Blower Proof Switch opened during purge,
or air inlet is blocked.
AIRFLOW FAULT
DURING IGN
The Blower Proof Switch opened during ignition.
AIRFLOW FAULT
DURING RUN
The Blower Proof Switch opened during run.
DELAYED
INTERLOCK OPEN
The Delayed Interlock is open.
DIRECT DRIVE
SIGNAL FAULT
The direct drive signal is not present or is out of range.
FFWD TEMP
SENSOR FAULT The temperature measured by the Feed Forward (FFWD)
Sensor is out of range.
FLAME LOSS
DURING IGN The Flame signal was not seen during ignition or lost within 5
seconds after ignition.
FLAME LOSS
DURING RUN
The Flame signal was lost during run.
HEAT DEMAND
FAILURE The Heat Demand Relays on the Ignition board failed to
activate when commanded.
HIGH EXHAUST
TEMPERATURE
The High Exhaust Temperature Limit Switch is closed.
HIGH GAS
PRESSURE
The High Gas Pressure Limit Switch is open.
HIGH WATER
TEMPERATURE The temperature measured by the Outlet Sensor exceeded
the Temp Hi Limit setting.
HIGH WATER TEMP
SWITCH OPEN
The High Water Temperature Limit Switch is open.
IGN BOARD
COMM FAULT A communication fault has occurred between the PMC board
and Ignition board.
IGN SWTCH CLOSED
DURING PURGE The Ignition Position Limit switch on the Air/Fuel Valve closed
during purge.
IGN SWTCH OPEN
DURING IGNITION The Ignition Position Limit switch on the Air/Fuel Valve
opened during ignition.
INTERLOCK
OPEN
The Remote Interlock is open.
LINE VOLTAGE
OUT OF PHASE
The Line (Hot) and Neutral wires are reversed.
LOW GAS
PRESSURE
The Low Gas Pressure Limit Switch is open.
LOW WATER
LEVEL
The Low Water Cutoff board is indicating low water level.
NETWORK COMM
FAULT The RS-485 network information is not present or is
corrupted.