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Place this manual, the control manual and the burner manual along with related
consumer information in an easily accessible location. Installers should make the
consumer aware of the content and location of this information.
11.2 Honeywell control L7248 - Adjusting Settings
- To discourage unauthorized changing of Aquastat settings, a procedure
to enter the ADJUSTMENT mode is required.
- To enter the ADJUSTMENT mode, press the UP, DOWN and I buttons
simultaneously for three seconds.
- Press the I button until the feature requiring adjustment is displayed then
press the UP and/or DOWN buttons to move the set point to the desired
value.
Note: After 60 seconds without any button inputs, the control will automatically
return to the RUN mode and lock the setting.
Error Codes
When attempting to diagnose system performance, reference to the LED display can help to
identify specific areas not working properly. The LED display will scroll ERR, followed by a
digit (1-8). Refer to the information inside the cover of the control L7248.
Err 1
Sensor fault
Check sensor
Err 2
ECOM fault
Check Optional EnviraCOM
wiring
Err 3 Hardware fault Replace control
Err 4
B1 fault
Check B1 wiring/voltage
Err 5
Low line
Checl L1 - L2 > 110 V a/c
Err 6
Fuse
Check ECOM wires, replace
fuse
Err 7
EEPROM
Reset limit values
Err 8
Multiple Err 4
Press/Hold
I for 60 sec
min*