Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX B – STARTUP, STATUS, AND FAULT MESSAGES
Page
84
of
144
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0128_0B
07/17/2017
Ph.: 800-526-0288
Fault Messages
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 Exhaust Temperature has exceeded 200°F (93.3
°C
).
GAS PRESSURE FAULT
The High Gas Pressure Limit switch is open or the Low 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 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.
