106636-02 - 12/19
35
X-2
Installation, Operating & Service Manual
Display
Status
Recommended Corrective Action
Blank
Boiler or Control is not powered
No 120 Vac Power at boiler, check breaker and wiring between breaker panel and
boiler
Err
4
Flame Current Lower than Threshold
Check pilot assembly. Refer to Troubleshooting Section, D6.
Err
6
Flame Sensed Out of Normal Sequence
Flame sensed out of normal sequence (before opening gas valve or after closing gas
valve). Check gas valve for proper operation.
Err
18
Electronics Failure
Cycle power to control. Replace control if problem persists.
Err
23
Flame Sensed During Pre-purge
Flame sensed during pre-purge (before gas valve signaled open). Check the gas
valve for proper operation. Replace gas valve if problem persists.
Err
32
Temperature Sensor Failure
Temperature sensor or interface failure (open or short connection, increased
connection resistance, dual sensor mismatch) or control hardware failure.
- Check sensor is securely attached to control P7 connector.
- Check sensor wire is not damaged.
- If secure and in good condition, replace sensor.
- If problem persists, replace control.
Err
55
Damper Failed to Open
Atmospheric Damper End Switch failed to close (end switch contacts stuck open).
Refer to Troubleshooting Section, D5.
Err
56
Damper Failed to Close
Damper open. Voltage should not be present on P6-5. Control, vent damper or
wire harness is defective. While the Err 56 is displayed by the control, perform the
following tasks:
• Remove call for heat (adjust thermostat or remove wire from thermostat connection.
• Check for 24Vac between P6-5 and ground.
• If voltage not present, attempt to start boiler again.
• If 24Vac is present, unplug vent damper harness from control.
• With wire harness unplugged, check for 24Vac between P6-5 (on Control)
and ground.
• If voltage present, replace control.
• If voltage not present, failed vent damper or wiring harness.
• Check wiring harness for shorts or mis-wiring. Replace if defective.
• If harness not defective, replace vent damper.
Err
57
Flame Rod Shorted to Burner Ground
Flame Rod shorted to burner ground, this can result from excessive flue gas
condensation.
- Check for excessive condensate. Dry pilot. Adjust setpoint higher.
- Check for loose or damaged ignition wire.
Err
58
AC Line Frequency
Error AC Signal is too noisy or frequency is incorrect. Check supply voltage.
Check Sensor for Common shorted to ground.
Err
59
Line Voltage Error
AC voltage out of specification high or low. Check supply voltage.
Err
60
Thermostat Input Higher than Threshold
Check thermostat wiring.
Err
61
Line Voltage Unstable
Possibly too many heavy loads switching on and off cause erratic supply voltage.
Check supply voltage.
Err
63
Soft Lockout – Maximum Recycles
Exceeded
Maximum number of recycles exceeded. Refer to Troubleshooting Section, D6.
Err
64
Soft Lockout – Internal Failure
Electronics has detected an error. This can be caused by an actual controller internal
fault or wiring fault:
- Check vent damper, cycle power with vent damper disconnected. If error
is cleared, reconnect vent damper and refer to Recommended
Corrective Action listed under
stA 20
, damper failed to open.
- Check pilot assembly,
- If problem persists, replace control.
C. Use Control Display
ERR
(ERROR) Number To Direct TroubleShooting Efforts
If control detects an error it will flash “
Err
” (ERROR) followed by a number. Use this number to identify boiler
problem and corrective action in table below. If there is no Err display, proceed to Troubleshooting Section D:
14
Troubleshooting
(continued)
