Watts Aerco Benchmark Series User Manual

Benchmark Platinum-Edge: Operation-Service Manual
SECTION 6 – TROUBLESHOOTING
OMM-0137_D • GF-211 • 7/16/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 141 of 146
TABLE 10-1: Boiler Troubleshooting Procedures
Fault Probable Causes Corrective Action
OUTDOOR
TEMP SENSOR
FAULT
1. Loose or broken wiring.
1. Inspect Outdoor Temperature sensor for loose or broken wiring.
2. Defective Sensor. 2. Check resistance of sensor to determine if it is within specification.
3. Incorrect Sensor.
3. Ensure that the correct sensor is installed.
RECIRC PUMP
FAILURE
1. Internal recirculation pump failed. 1. Replace recirculation pump.
REMOTE
SETPT SIGNAL
FAULT
1. Remote setpoint signal 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 continuity of wiring between source and unit.
2. Signal is not isolated (floating) if 4 to 20 mA. 2. Check signal at source to ensure it is isolated.
3. Edge Controller signal type selection switches not
set for correct signal type (voltage or current).
3. Check DIP switch on PMC board to ensure it is set correctly for the type
of signal being sent. Check control signal type set in the Remote
Signal parameter (Advanced Setup Unit

Application
Configuration).
RESIDUAL
FLAME
1. Defective Flame Detector. 1. Replace Flame Detector.
2. SSOV not fully closed.
3. Wire strand from burner head in contact with
Flame Detector
2. Check open/close indicator window of Safety Shut-Off Valve (SSOV)
and ensure that the SSOV is fully closed. If not fully closed, replace the
valve and or actuator.
Close the Gas Shut-Off Valve downstream of SSOV. Install a
manometer or gauge at the leak detection port between the SSOV and
Gas Shut Off Valve. If a gas pressure reading is observed replace the
SSOV Valve and/or Actuator.
3. Ensure Flame Detector is in good condition and is not tilted inward
toward burner head.
SSOV FAULT
DURING
PURGE
See SSOV SWITCH OPEN
SSOV FAULT
DURING RUN
SSOV switch closed for 15 seconds during run. 1. Replace actuator.

Watts Aerco Benchmark Series Specifications

General

Brand	Watts
Model	Aerco Benchmark Series
Category	Boiler
Language	English