MODU-FIRE® Forced Draft Gas-Fired Boiler
40
5.8 A
UTO
-
RESET
E
RROR
C
ODES
–
E##
Code ENVI Display
Lockout
Description
E01 OUT TEMP SENS OPEN Outlet Temperature Sensor Open Boiler outlet water temperature sensor open circuit
E02 IN TEMP SENS OPEN
Inlet Temperature Sensor Open Boiler inlet water sensor temperature open circuit
E03 FLUE TMP SENS OPEN Flue Temperature Sensor Open Boiler flue gas temperature sensor open circuit
E04 DHW TEMP SENS
OPEN
DHW Temperature Sensor Open Domestic Hot Water temperature sensor open circuit
E05 HX TEMP SENS OPEN Heat Exchanger Temperature
Sensor Open
Heat Exchange temperature sensor open circuit
E11 OUT TEMP SENS
SHORT
Outlet Temperature Sensor Short Boiler outlet water temperature sensor short circuit
E12 IN TEMP SENS SHORT Inlet Temperature Sensor Short Boiler inlet water temperature sensor short circuit
E13 FLUE TMP SENS
SHORT
Flue Temperature Sensor Short Boiler flue gas temperature sensor short circuit
E14 DHW TEMP SENS
SHORT
DHW Temperature Sensor Short Domestic Hot Water temperature sensor short circuit
E15 HX TEMP SENS SHORT Heat Exchanger Temperature
Sensor Short
Heat Exchange temperature sensor short circuit
E16 HEADER SENS SHORT Header Temperature Sensor is
defective
Header temperature sensor on IF board has a short
circuit or an open circuit
E18 LINE NEUTRAL REV
Electrical Error
Hot and Neutral are reversed
E20 FALSE FLAME
False Flame
Flame detected when no flame should be present
E21 LOW FLOW / ILK
Low Water Flow or Open Inter-
lock Circuit
E21 converts to A07 after 5 minutes
E22 NO GROUND 60 HZ
ERR
No Ground error
No ground connected or voltage on ground
E23 LINE FREQUENCY ERR Line Frequency Error
Line frequency deviates from 60Hz by more than 2%
E24 FAULTY GROUND
Faulty Ground
Ground/Earth connection is not functioning correctly
E30 HIGH FLUE TEMP
Flue Gas Temperature Too High Temperature of the flue gas is greater than setpoint
+ differential
E32 HIGH INLET TEMP
Inlet Temp Too High
Inlet water is greater than 194°F
E34 BLOCKED FLUE
Blocked Flue
Hi exhaust back pressure switch is tripped due to
excess pressure in the flue/stack or excessive nega-
tive cabinet pressure
E41 REVERSE FLOW IN
OUT
Reversed Water Flow
The water flow through the boiler is reversed (Inlet
water is hotter than outlet water)
E42 INTERAL ERROR 48
Internal Error 48
Call for service.
E46 INTERAL ERROR 35
Internal Error 35
Call for service.
E47 INTERAL ERROR 36
Internal Error 36
Call for service.
E48 INTERAL ERROR 37
Internal Error 37
Call for service.
E49 RAPID RISE HX ERROR Rapid Rise Heat Exchanger
Temperature
Temperature across heat exchanger is rising faster
than allowed
E50 RAPID RISE ERROR
Rapid Rise Outlet Temp
Temperature of the Outlet water is rising faster than
allowed
E51 INTERNAL ERROR 67
Internal Error 67
Call for Service
E52 WRONG BOILER TYPE Wrong Boiler Type
Control and Boiler do not match (control is pro-
grammed for another type of Harsco boiler)
E 54 IF COMM FAILURE
Interface Board Failure
No communication with Interface Board
