User Guide

13
6. Appliance Control Display
6.7 Error Codes
Red LED above the reset button will flash. Correct condition first,
then press the reset button.
6.8 Warning Codes
In situations where the boiler takes a preventative action without
going into a hard lockout, a warning code flashes in the main display.
T
he warning code will alternate with the normally displayed value.
The cause of the warning code should be investigated and corrected
i
mmediately to return the boiler to full functionality.
10, 11, 12,
1, 28
4
0
2
29,30
5
6
8
13, 14
CH supply sensor fault
•
Check wiring for break
•
Check for proper flow direction
• Replace supply sensor
• E10 Open sensor
• E 11 Shorted sensor
•
E12 Decreased too quickly
•
E13 Increased too quickly
•
E14 Stuck
• Replace return sensor
• E 20 Open sensor
•
E 21 Shorted sensor
• E22 Decreased too quickly
• E23 Increased too quickly
• E24 Stuck
2
0, 21, 22,
23, 24
CH return sensor fault
•
Check wiring for break
•
Check for proper flow direction
Sensor fault after self check
• Replace supply and/or return sensors
Temperature too high
• Air in system
• Pump not running
• Insufficient water flow, shut off valves closed, pump setting too low
• Flow switch sticking or miss-installed
• Check for wiring error
Supply sensor and
return sensor
swapped
• Check for proper flow direction
• Replace supply and/or return sensors
No flame signal
• Manual gas shut off valve closed
• Remove air from gas pipe
• Gas supply pressure too low
• Gas valve or ignition unit not powered
• Incorrect ignition gap
• Check adjustment of gas valve
Poor flame signal
• Condensate drain blocked
• Check adjustment of gas valve
Flame detection fault
• Replace ignition cable
• Replace ignition unit at gas valve
• Replace boiler controller
Incorrect fan speed
• Fan rubbing on cabinet
• Wiring between fan and cabinet
• Check wiring for poor contact
• Replace fan
Gas valve relay fault
• Replace boiler controller
Operating
Display
(Flashing)
Main Display
Possible Solution
Error Description
E
18, 19
Flue sensor fault
• E18 Open sensor
• E19 Shorted sensor
• Check/Replace flue sensor
E
7,16, 17
DHW sensor fault
• E16 Shorted sensor
• E17 Open sensor
• Check/replace DHW sensor
• E7 Excessive temperature
• Check gas orifice
• Check combustion settings
E
50F
Improper power frequency
• Verify ground
• Frequency should be between 45 and 65 Hz
E
E
E
E
E
E
E
E
E
E101
Flue gas temperature
approaching limit
• Supply water temperature too high
• Check positioning of flue gas sensor
• Ambient temperature too high
• Check heat exchanger for debris
• Replace flue gas temperature sensor
E105 Outdoor Sensor Short
• Check wiring
• Replace outdoor sensor