AERCO Modulex EXT 321 - 1123 - Manual (Page 115)

MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
The table below lists the fault codes and fault descriptions associated with the E8 Controller.
Table 6-2: E8 Controller Fault Codes
FAULT CODE FAULT DESCRIPTION
PCB Element Fault
E 1 Intervention of the high limit thermostat (TL).
E 2 Insufficient gas pressure.
E 4 No flame detected during the ignition phase.
E 5 Loss of flame signal during boiler operation.
E 6 Over high water temperature detected by the heating sensor (SR) (>203°F).
E 10 Internal failure of the local control PCB (BMM).
E 11 Flame signal detected before the ignition cycle.
E 12 Local flow sensor failure SR1 first module.
E 14 Failure of the heating return sensor (SRR).
E 15
Difference between the global return heating temperature global sensor and the
heating flow sensor greater than (>) 86 °F (rp +10).
E 16 Boiler body temperature very low: Ice forming risk
E 20 Flame signal detected after burner is OFF.
E 24
Modulating fan speed failure: failed to reach the correct speed within 30 seconds
from starting of burner ignition cycle.
E 26 Modulating fan speed failure:
failed to stop within 30 seconds from end of operation
E 28 Common chimney obstruction.
E29 Water inside chimney chamber.
E 30 Alteration of the operating parameters caused by EMC disturbances.
E 32 Mains supply voltage < 108 VAC.
E 40 Low system flow rate.
E 41 Presence of air in the pump (only with SensorLogic)
E 42 Pump blocked (only with SensorLogic)
E 43 Pump wire failure (only with SensorLogic)
System Manager Fault – Sensor Defective (break/short circuit)
E 69 E8: F5 – Flow temperature sensor heating circuit 2.
E 70 E8: F11 – Flow temperature sensor heating circuit 1.
E 71 E8: F1 – Lower storage temperature sensor (Buffer).
E 72 E8: F3 – Higher storage temperature sensor (Buffer).
E 75 E8: F9 – Outer temperature sensor (AF).
E 76 E8: F6 – DHW storage temperature sensor (SPF).
E 78 E8: F8 – Boiler temperature sensor (KF).
E 80 E8: F2 – Room temperature sensor heating circuit 1.
E 83 E8: F15 – Room temperature sensor heating circuit 2.
E 135 E8: F12 – Lower DHW storage temperature sensor MF2.
E 136 E8: F13 – Boiler 2, Manifold 2 MF 3.
E 137 E8: F14 – Manifold 1, Multifunction 4.
E 138 E8: F15 – Room temperature Hc2.
OMM-0087_0E AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 115 of 148
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