MACH
®
Series
Gas-Fired Boiler
Appendix
39
Code
ENVI Display
Lockout
Description
A38
MAX DT EXCEEDED
Max Delta Temp Exceeded
Maximum temperature differential across the
boiler has been exceeded
A39
RAPID RISE INLET TMP
Rapid Rise Inlet Error
Inlet temperature is rising too rapidly
A40
RAPID RISE OUT TEMP
Rapid Rise Outlet Error
Outlet temperature is rising too rapidly
A41
RAPID RISE HX TEMP
Rapid Rise HX Temp
Temperature across heat exchanger is rising
faster than allowed
A43
LOW WATER LEVEL
Low Water Cutoff
Water is too low for boiler to operate
A45
INTERNAL ERROR 31
Internal Error 31
Call for service.
Note: When an Internal Error occurs, as identified above, the failure is internal to the ENVI™ boiler control and
replacement of the ENVI™ control is required. A qualified service technician must replace the ENVI™ control.
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
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
negative 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.
