Watts AERCO Benchmark BMK5000 User Manual

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 9 – TROUBLESHOOTING
OMM-0145_D • GF-218 • 11/2/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 150 of 213
TABLE 9-1: Boiler Troubleshooting Procedures
Fault
Probable Causes
Corrective Action
DELAYED
INTERLOCK
OPEN
1. Delayed Interlock Jumper not
properly installed or missing.
1. Check to insure jumper is properly installed
across the Delayed Interlock terminals in the
I/O Box.
2. Device proving switch hooked
to interlocks is not closed.
2. If there are 2 external wires on these
terminals, check to see if an end switch for a
proving device (such as a pump, louver, etc.)
is tied these interlocks. Ensure that the device
and/or its end switch is functional. A jumper
may be temporarily installed to test the
interlock.
DIRECT
DRIVE
SIGNAL
FAULT
1. Direct drive signal is not
present:
• Not yet installed.
• Wrong polarity.
• Signal defective at source.
• Broken or loose wiring.
1. Check I/O Box to ensure signal is hooked up.
• Hook up if not installed.
• If installed, check polarity.
• Measure signal level.
• Check wiring continuity between source
and unit.
2. Signal is not isolated
(floating).
2. Check signal at source to ensure it is isolated.
3. Edge [i] Controller signal type
selection switches not set for
correct signal type (voltage or
current).
3. Check DIP switch on the Controller’s Interface
board to ensure it is set correctly for the type
of signal being sent. Check control signal type
set in Advanced Setup → BST Cascade →
Application Configuration screen.
FLAME LOSS
DURING IGN
1. Worn Flame Detector.
1. Remove and inspect the Flame Detector for
signs of wear. Replace if necessary.
2. No spark from Spark Igniter.
2. Close the internal gas valve in the unit. Install
and arc a spark igniter outside the unit.
3. Defective Ignition
Transformer.
3. If there is no spark, check for 120VAC at the
primary side to the ignition transformer during
the ignition cycle.
4. Defective Ignition/Stepper
(IGST) Board.
4. If 120VAC is not present, the IGST Board in
the Edge [i] Controller may be defective. Refer
fault to qualified service personnel.
5. Defective SSOV.
5. While externally arcing the spark igniter,
observe the open/close indicator in the Safety
Shut-Off Valve to ensure it is opening. If the
valve does not open, check for 120VAC at the
valve input terminals. If 120VAC is not
present, the IGST board in the Edge [i]
Controller may be defective. Refer fault to
qualified service personnel.

Watts AERCO Benchmark BMK5000 Specifications

General

Brand	Watts
Model	AERCO Benchmark BMK5000
Category	Boiler
Language	English