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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
E26:
Blower fails to
stop within 30
seconds of
termination of
ignition
1. Blower power connector
not properly attached to
blower.
2. Bad wire connection.
3. Blower is faulty
1. Check blower connector to ensure it is properly
seated.
2. Check electrical continuity of blower wires. Repair
or replace wires if necessary.
3. Try connecting blower to connector from other
blower known to function properly. Replace
blower if blower still does not functi
o
n properly.
E27:
Air pressure
switch detects a
fault during
ignition time
1. Damaged hose.
2. Faulty switch.
3. Damaged wires.
1. Check hoses and replace if necessary.
2. Check switch and replace if damaged.
3. Check wiring for damage and repair if necessary.
E30:
Alteration of
parameters
settings due to
EMC
disturbances
1. Ground cabling loose or
damaged.
2. Interference with
external devices emitting
EMC.
1. Check ground cabling and replace if necessary.
2. Investigate for nearby devices emitting EMC
interference.
E32:
Electrical power
supply voltage <
108 VAC
1. Test power supply for
damage.
2. Check for loose power
wire connections
1. Repair or replace power source.
2. Reseat connections.
Table 10-1: Boiler Troubleshooting – PCB Terminal (Continued)
