Troubleshooting
6-32
Algas-SDI Operations & Maintenance Manual P/N 52632
#3
- THERMOCOUPLE IS OPEN OR THE VAPORIZER TEMPERATURE REACHED THE 2ND HIGH
TEMPERATURE LIMIT 419°F / 215°C
Check for an open or broken thermocouple connection. Verify the connection to
the control board is secure, on Division 1 and Multiple Vaporizer system check
that the thermocouple connector is still connected at the bottom of the core. To
reset
"3"
indications the power must be reset at the Main disconnect. Always
verify that the polarity is correct when connecting the thermocouple.
If the vaporizer has overheated to this point, it indicates a total failure of the
primary temperature control circuit. Replace the control board and thoroughly
test the operation of the vaporizer. Call or fax the factory for possible warranty
and disposition of the failed circuit board.
If you change the control board and the annunciator still shows a
“3",
change or
repair the #2 thermocouple.
See Thermocouple Tests.
If the vaporizer has not overheated, the #2 thermocouple has a fault.
See
Thermocouple Tests.
#4
-
HIGH LIQUID LEVEL SWITCH OPEN
This indicates that the vaporizer is unable to provide enough heat to vaporize the
amount required by the load or the liquid level switch is inoperative. Do the
following tests:
1. Attempt to restart the vaporizer. If the vaporizer operates normally - do tests
#3, 4, and 5 below. If the vaporizer will not start - do test #2.
2. Close the vaporizer outlet hand valve. Open the inlet hand valve. Apply
power to the vaporizer. Press and hold the
START
switch for 60 seconds.
The heaters should come on for a few seconds and then go off. This
procedure forces any liquid in the vaporizer back toward the tank. Release
the
START
switch. Does the vaporizer stay on?
If
NO
:
Check the liquid level switch.
See Liquid Level Switch Test.
If
YES
:
Your vaporizer was full of liquid. Do the “Solenoid Valve Leak
Test". If it checks good, proceed to Tests #3, 4, and 5.
3. Check voltage and full load amperage of the vaporizer.
See Voltage and Amperage Test.
4. Check the vaporizer control system for correct operation.
See Control System Operation.
5. If the previous tests do not indicate a problem with the vaporizer, it is likely
that the load is greater than the vaporizer’s capacity. Check the load and
match that number against the capacity rating of your vaporizer.
(See the
Nameplate on the vaporizer or Data Sheet.)
Your total added load should
be equal to or less than the vaporizer capacity rating.
