Aerco Modulex MLX-303 User Manual

MC2: 10/03/12 Page 73 of 90
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
GF-115-H
OMM-0083_0B
Modulex MLX Series Gas Fired Boiler System
Operation and Maintenance Manual
Chap 10:
Troubleshooting
FAULT
INDICATION
PROBABLE
CAUSES
CORRECTIVE ACTION
E69:
E8/1/F5 – Flow
sensor Heating
Circuit 2
Defective or
damaged PCB
Replace PCB
E70:
E8/5/F11 – Flow
sensor Heating
Circuit 1
Defective or
damaged PCB
Replace PCB
E71:
E8/1/F1 – Buffer
storage tank low
sensor
1. Loose or broken
wiring.
2. Defective
Sensor.
3. Incorrect Sensor.
1. Inspect sensor for loose or broken wiring.
2. Check resistance of sensor to determine if it is within
specification.
3. Ensure that the correct sensor is installed.
E72:
E8/1/F3 – Buffer
storage tank top
sensor
1. Loose or broken
wiring.
2. Defective
Sensor.
3. Incorrect Sensor.
1. Inspect sensor for loose or broken wiring.
2. Check resistance of sensor to determine if it is within
specification.
3. Ensure that the correct sensor is installed.
E75:
E8/1/F9 – Outdoor
sensor
1. Loose or broken
wiring.
2. Defective Sensor.
3. Incorrect Sensor.
1. Inspect sensor for loose or broken wiring.
2. Check resistance of sensor to determine if it is within
specification.
3. Ensure that the correct sensor is installed.
E76:
E8/1/F6 – Storage
tank sensor
1. Loose or broken
wiring.
2. Defective Sensor.
3. Incorrect Sensor.
1. Inspect sensor for loose or broken wiring.
2. Check resistance of sensor to determine if it is within
specification.
3. Ensure that the correct sensor is installed.
E78:
E8/1/F8 – Boiler
sensor
1. Loose or broken
wiring.
2. Defective Sensor.
3. Incorrect Sensor.
1. Inspect sensor for loose or broken wiring.
2. Check resistance of sensor to determine if it is within
specification.
3. Ensure that the correct sensor is installed.
E80:
E8/1/F2 – Room
sensor for Heating
Circuit 1
1. Loose or broken
wiring.
2. Defective Sensor.
3. Incorrect Sensor.
1. Inspect sensor for loose or broken wiring.
2. Check resistance of sensor to determine if it is within
specification.
3. Ensure that the correct sensor is installed.
Table 10-1: Boiler Troubleshooting – System Manager – Defective Sensor

Aerco Modulex MLX-303 Specifications

General

Brand	Aerco
Model	Modulex MLX-303
Category	Boiler
Language	English