Weil-McLain ULTRA 230 - Manual (Page 32)

32
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)]
30 Temperature rise across boiler over
58 °F, and occurred 20 times. 1 Flow problem through boiler — Temperature rise through boiler should be less than
35 °F.
2 Make sure system does not have trapped air preventing proper flow.
3 Inspect and verify system piping and components.
4 Verify piping agrees with boiler manual recommendations.
5 Verify proper circulator(s) operation.
6 Possible loose connector on boiler supply/return sensor(s). Tighten connector.
7 Possible bad supply/return sensor.
31 Outlet water temperature sensor
short circuit. 1 Inspect outlet water temperature sensor and wiring. Replace sensor if wiring correct
and in good condition. Replace low voltage wiring harness if problem persists. Replace
control module if harness replacement doesn’t resolve.
32 Return water temperature sensor
short circuit. 1 Inspect return water temperature sensor and wiring. Replace sensor if wiring correct
and in good condition. Replace low voltage wiring harness if problem persists. Replace
control module if harness replacement doesn’t resolve.
36 Outlet water temperature sensor
open circuit. 1 Inspect outlet water temperature sensor and wiring.
Replace sensor if wiring correct and in good condition. s
Replace low voltage wiring harness if problem persists. s
Replace control module if harness replacement doesn’t resolve. s
37 Return water temperature sensor
open circuit. 1 Inspect return water temperature sensor and wiring.
Replace sensor if wiring correct and in good condition. s
Replace low voltage wiring harness if problem persists. s
Replace control module if harness replacement doesn’t resolve. s
44 Internal control failure 1 Reset control and retry. If problem persists, replace control module.
52 Flue temperature exceeded 225 °F. 1 Verify flue temperature with thermometer.
If actual temperature does not correlate with Information mode #5, replace flue s
sensor
2 Heat exchanger may need to be cleaned — perform the boiler complete maintenance
procedures beginning on page 33 of this guide.
3 Burner problem — verify gas pressure, burner firing rate, combustion. Correct prob-
lems.
If combustion is still unacceptable, follow the procedures beginning on page 38 of this
guide.
60 Internal control failure 1 Reset control and retry. If problem persists, replace control module.
61 Internal control failure 1 Reset control and retry. If problem persists, replace control module.
65 Blower signal too low (not enough
driving force) 1 Inspect wiring and connections.
If wiring is correct, replace blower assembly. s
If blower assembly replacement is unsuccessful, replace control module. s
&IGURE Troubleshooting procedures — when display shows hard lockout code (continued)
Troubleshooting
(continued)
Instructions in this supplement are based
on factory default parameter settings.