Weil-McLain ULTRA 230 - Manual (Page 25)

25
Part number 550-100-029/0810
GAS
-
FIRED WATER BOILER SERIES 1 & 2
— Control supplement & Service guide
Boiler not firing and: Check for: Corrective actions:
Display first digit shows
0 and last digits show 2
or 3-digit number (boiler
outlet water temperature). Are room thermostat and DHW
aquastat satisfied? 1 If yes, then boiler should be off — there is no call for heat.
Turn up thermostat or aquastat. Boiler should start.
Is room thermostat or DHW
aquastat calling for heat? 2 Check parameters 2 and 3.
To change to Parameter mode, press the MODE button one time s
when in Standby mode.
Parameter 2 must be ON for DHW operation —
s [2 01] on
display .
Parameter 3 must be ON for central heating operation — s [3
01 ] on display .
Refer to instructions in this guide to set parameters. s
Does display intermittently show 0
for outlet water temperature? 3 Check parameters 1 and 3.
To change to Parameter mode, press the MODE button one time s
when in Standby mode.
If parameter 1 shows 68:
Press “+” until display returns to 140. s
Then press “Store.” s
Display will blink when setting is accepted and stored. s
Press “+” and display will return to “01” s
Then press “Store.” s
Display will blink when setting is accepted and stored. s
Is blower running on low? 4 From Standby mode, press “Mode” twice and display will change
to “Info”
Press “Step” until display shows #6. s
If #6 value displays as 32, replace the blower assembly. s
Is room thermostat or DHW calling
for heat, but boiler is not firing? 5 Check thermostat or aquastat:
Turn off power to the boiler. s
Install a temporary jumper on low voltage terminal strip termi- s
nals 5 and 6 for central and terminals 3 and 4 for DHW.
Retry. If boiler operates, check the thermostat or aquastat and
s
connect wiring. Replace if necessary.
Remove jumper and retry.
s
6 Check boiler wiring:
Turn off power to the boiler. s
Check wiring against wiring diagram. Verify all wiring is in good s
condition and securely fastened.
Replace harness if necessary and retry.
s
7 If boiler still does not fire, replace the control module.
Check information mode, #4 —
does display show 4.230? 1 The outdoor sensor has failed or the wires are shorted. Replace the
outdoor sensor if wiring is ok.
Also, remove the outdoor sensor wires and check operation to ensure
no other problem is occurring.
&IGURE Troubleshooting procedures (continued)
Troubleshooting
(continued)
Instructions in this supplement are based
on factory default parameter settings.