Weil-McLain ULTRA 230 - Manual (Page 30)

30
Part number 550-100-029/0810
GAS
-
FIRED WATER BOILER SERIES 1 & 2
— Control supplement & Service guide
Troubleshooting
(continued)
Instructions in this supplement are based
on factory default parameter settings.
HARD LOCKOUT condition [Display flashes first digit, “E” and last two digits (code)]
04 Voltage lost after lockout occurred
or AC voltage fluctuations on
incoming power 1 Control module will only restart with manual reset, even after power loss.
Code 04 occurs if power is interrupted while another error is present or due to power s
input fluctuations.
2 Incoming power fluctuations may cause MCBA module to go into E-04 hard error
code.
This can occur due to power failure, brown-out or poor electrical input from a back- s
up generator.
To reduce shutdowns due to poor power conditions, install Weil-McLain part number
s
383-500-021, Time Delay Relay (3 minute incoming power time delay) to give incom-
ing power time to stabilize before powering boiler.
3 In severe cases of power fluctuations, Time Delay Relay may not solve E-04.
If so, very good incoming power line filter or Uninterruptible Power Source (UPS) s
may correct.
05 Internal Control or Display error 1 Replace display and display ribbon cable.
2 Replace control module.
06 Internal Control Failure 1 Reset control and retry. If problem persists, replace control module.
07 Gas valve relay error 1 Gas valve wiring may be shorted to ground. Check continuity to ground
2 Defective gas valve. Measure resistance between outer two pins on gas valve — should
be approximately 50 ohms. Resistance from each pin to ground must be infinity.
08 Internal Control Failure 1 Reset control and retry. If problem persists, replace control module.
09 Internal Control Failure 1 Reset control and retry. If problem persists, replace control module.
11 EEPROM Error 1 Ignition interference.
2 Replace control module.
12 External limit open (between
terminal 6 and 8) 1 Check low water cut-off, limit controls, etc. wired between terminals 6 and 8.
13 Usually indicates a sensor problem 1 Measure the resistance of each of the sensors — return, supply and flue. See page 23 for
sensor resistance values. Replace sensor(s) if necessary.
14 Supply water sensor problem 1 Measure the resistance of each of the supply sensor. See page 23 for sensor resistance
values. Replace sensor if necessary.
15 Internal control failure 1 Reset control and retry. If problem persists, replace control module.
16
17
&IGURE Troubleshooting procedures — when display shows hard lockout code (continued)
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