Weil-mclain ULTRA 230 Bedienungsanleitung PDF herunterladen (Seite 31)

Part number 550-100-029/0810

GAS-FIRED WATER BOILER SERIES 1 & 2 —

Control supplement & Service guide

HARD LOCKOUT condition [Display ﬂashes ﬁrst digit, “E” and last two digits (code)]

18 Thermal overrun condition – Outlet

water temperature above 210 °F.

This should only happen when the heat demand is lower than the lowest ﬁring rate of

the boiler, such as operation of a single, small zone. Check system for:

Verify boiler and system are full of water.

Make sure system does not have trapped air preventing proper ﬂow.

Inspect and verify system piping and components.

Verify piping agrees with boiler manual recommendations.

Verify proper circulator(s) operation.

Possible loose connector on boiler outlet sensor. Tighten connector.

Possible bad boiler supply outlet sensor.

Use a contact thermometer to check outlet water temperature.

Compare to temperature shown with display in Info mode (“1” in the display’s ﬁrst s

digit — see Figure 14, page 20).

Replace return temperature sensor if results are not close. s

Replace control module if sensor replacement doesn’t solve problem.s

19 Thermal overrun condition – Return

water temperature above 210 °F.

Verify boiler and system are full of water

Make sure system does not have trapped air preventing proper ﬂow

Inspect and verify system piping and components

Verify piping agrees with boiler manual recommendations.

Verify proper circulator(s) operation and direction

Possible loose connector on boiler outlet sensor. Tighten connector

Possible bad boiler return boiler inlet sensor

25 Temperature rise > 58°F 1

Check ﬂow.

Check pipe size and circulator capacity.

Follow suggestions for hard lockout code 18.

28 Blower not running 1

Change display to Information mode — if INFO #6 shows 6._32, the blower has

failed.

Verify 120 volts at blower connection — If no 120 VAC, inspect wiring.

Replace control module if wiring is correct and in good condition.

If 120VAC is present, remove low voltage wiring harness.

If blower does not run, replace the blower. If blower runs, replace the control module.

29 Blower signal not zero when it

should be

Change display to Information mode — if INFO #6 shows 6._32, the blower has

failed.

This might happen if the vent is facing a very windy side of the building. If the blower

is turning because of the wind when a call for heat initiates on the Ultra, an E-29 might

occur. Move the vent to a less windy location

Check the wiring.

Replace blower.

Replace control module.

&IGURE Troubleshooting procedures — when display shows hard lockout code (continued)

Troubleshooting (continued)

Instructions in this supplement are based

on factory default parameter settings.

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