Troubleshooting
Algas-SDI Operations & Maintenance Manual P/N 52632
6-31
0
“0”
is an indication that the unit shut down to the loss of AC voltage for
units without Auto Restart. The Vaporizer is designed to restart itself
when a power glitch or momentary power loss occurs up to 5 seconds. If
power loss is more than 5 seconds the annunciator will display “0” and
the alarm will activate. If power loss is longer than 5 seconds, you may
want to add the Auto Restart Option.
See Auto Restart Option.
NOTE
Annunciator numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 indicate a serious
safety problem and thus shut off the vaporizer and activate the
alarm. Before manually restarting the vaporizer, a service
technician should determine the cause of the problem and rectify it.
Control Board - Operation / Fault Annunciator
Code Indications and Troubleshooting
#0
- AC FAIL
There has been a power interruption long enough to shut the vaporizer off.
Check your incoming power source. Restart the vaporizer.
The alarm will activate on loss of AC voltage.
See above note.
#1
- TEMPERATURE SENSOR INOPERATIVE
Open or reversed thermocouple leads on the #1 thermocouple. Check the
thermocouple leads for breaks or loose or reversed connections.
See
“Thermocouple Tests”.
#2
- OVER-TEMPERATURE (1ST HIGH TEMPERATURE SAFETY SHUTDOWN AT 356°F / 180°C)
This indicates a control board failure or thermocouple positioning problem.
CHECKS
Shut the vaporizer outlet hand valve. Leave the inlet hand valve open. Set your
meter to volts DC and connect it to TP1 and TP7. This reading will correspond to
the vaporizer core temperature ( 0.75 VDC = 75°C ) Turn power on and press the
START
switch. Monitor the meter. The heaters should shut off at approximately
95°C ( 0.95 on the meter ).
If the heaters do not shut off at 95°C ( 203°F ), shut the unit off, disconnect power
and change the control board.
If the heaters shut off at 95°C ( 203°F ), but the temperature climbs above 140°C
( 284°F ), the thermocouple is not properly positioned in the vaporizer.
See
Thermocouple Position Failure.
