06/05/13 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526- 0288 Page 105 of 112
Modulex E8 Controller and BCM
Operations and Maintenance Manual
10.2.1 E8 Controller Fault Codes
The table below lists the fault codes and fault descriptions associated with the E8 Controller.
Table 10-2: E8 Controller Fault Codes
Supplier low gas pressure
Flame absence during ignition time
Flame absence during operation time
High temperature of element (> 203°F)
Low water pressure (only with SensorLogic)
Flame presence before ignition cycle
Local flow sensor failure
Auxi liary sensor failure (DHW)
Global return sensor failure
Difference between global return sensor and local flow sensor > di 86°F (rp +10)
Low temperature: risk of freeze
Flame present after burner switching off
Air pressure switch does not commute within 30 sec. in the ignition cycle
Air pressure switch always active
Fan out of control: doesn’t achieve correct speed within 30 sec. of ignition cycle start
Fan out of control: do not stop within 30 s ec. from the stop of the burner
Air pressure switch detect a technical fault during the ignition time
Parameters setting alteration
Electrical supplier < 108 Vac
Low system flow rate (only with SensorLogic)
Presence of air in the pump (only with SensorLogic)
Pump blocked (only with SensorLogic)
Pump wire failure (only with SensorLogic)
System Manager Fault – Sensor Defective (break/short circuit)
E8: F11 – flow sensor HC1
E8: F1 – buffer storage tank low sensor
E8: F3 – buffer storage tank top sensor
E8: F6 – storage tank sensor
E8: F15 – room sensor HC2
F12: HW Storage Tank Low Sensor, Multi-Function 2
F13: (PT1000): HS2, Collector 2, Multi-Function 3
F14: (PT1000): Collector 1, Multi-Function 4
F15 – room temperature HC2
Table 10-2: E8 Controller Fault Codes (Continued)