Weil-McLain ECO110 User Manual

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Troubleshooting (continued)

Display

Condition Diagnostics Corrective Action(s)

TEMPERATURE

SENSOR

Occurs if a temperature

sensor has electrically

TIPSUFE4)035PSIBT

become disconnected

(OPEN).

Will automatically reset if the

condition clears.

Check all the temperature readings of the boiler on the DIAGNOSTICS -

5&.1&3"563&4NFOVUPEFUFSNJOFJGBOZTFOTPSTBSFDVSSFOUMZEJTQMBZFE

BT4)035PS01&/$PNQBSFUIJTUPUIFCPJMFSUFNQFSBUVSFTSFDPSEFE

JOUIF%*"(/045*$4&33034-0$,065)*4503:5&.1&3"563&4

during the last several lockout conditions.

Determine which sensors are suspect and measure their resistance

value and compare it to the values shown in 'JHVSFQBHF. If the

resistance values are incorrect replace the temperature sensor. Refer to

repair parts section for proper part number.

065%0035&.1JTUIFPQUJPOBMPVUEPPSBJSUFNQFSBUVSFTFOTPS*GUIJT

is not being used it will always be shown as NONE. This is normal unless

the sensors were installed.

Check wire harness for loose connections and pin engagement at sensor

DPOOFDUJPOBOEUIFDPOUSPMNPEVMF6OQMVHDPOOFDUJPOBUTFOTPSBOE

at control module and check continuity between ends.

If problem persists after checking items above replace control module.

Refer to repair parts section for kit number.

Occurs if dual temperature

sensors values have spread

by more that 10º F if the

burner is on.

Automatically resets when

sensors are within 10º F.

'PMMPXQSPDFEVSFBCPWFGPS4)035BOE01&/TFOTPSDPOEJUJPOTUP

properly diagnose sensor. If measured resistance values of sensors

convert to temperatures separated by more than 10º F replace the

sensor.

FLUE TEMP

TOO HIGH

Occurs if ﬂue temperature

sensor exceeds 216º F.

Automatic reset occurs if

temperature drops below 216º F

for 2.5 minutes.

Manual reset is required if the

UFNQFSBUVSFSJTFTBCPWF¡'

Reset using manual reset screen

on display.

'PMMPXQSPDFEVSFGPSBCPWFGPS4)035BOE01&/TFOTPSDPOEJUJPOT

to properly diagnose sensor. In addition inspect heat exchanger

combustion chamber and ﬂueways for abnormal wear or buildup.

Inspect vent system for abnormal wear or damage.

Contact Weil-McLain Technical Support.

LOW WTR

CUTOFF OPEN

Occurs if low water cutoﬀ

contacts open.

Automatic reset occurs if contacts

are open at least one second, but

less than 5 seconds.

Manual reset of control module

if contacts are open longer than

5 seconds.

Check for low water condition in system. Repair system as necessary

refer to piping section of this manual.

If low water condition does not exist, check Diagnostics — Inputs screen

to view status of Low Water Cutoﬀ. If shown as OPEN check wiring

etween LWCO and control module. If wiring is correct and functioning,

then replace the LWCO.

If LWCO option is not installed, check the wiring of the jumper in control

module’s plug P12.

DISPLAY COMM

Occurs if display

communications out for 30

seconds.

Automatically resets when

communication is re-established.

Check for a loose connection at the molex plug on the control and

connection on the back of the display.

LIMIT OPEN

Occurs if manual or

automatic r eset l imit op ens.

Automatic external limit will reset

2½ minutes after external limit

device closes.

Manual limit fault must be reset

using manual Reset screen on the

display.

Is there an external safety device connected? If yes, trouble shoot the

external limit to determine and correct the cause that opened the limit.

Also check for loose wiring connections.

Inspect the connector on control module’s plug P13.

Ensure a jumper is installed across the left two (Pins 1&2) terminals if not

using a manual reset external limit.

Ensure a jumper is installed across the right two (Pins 3&4) terminals if

not using an automatic reset external limit.

Troubleshooting (continued)

&IGURE Troubleshooting suggestions for %#/ boilers — &AULTDISPLAYSDIAGNOSTICSANDCORRECTIVEACTIONS

Part number 550-142-122/0513

GAS-FIRED WATER BOILER — Boiler Manual

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Weil-McLain ECO110 ECO Wall Mount Gas Boiler

User Manual - Page 95