Alto-Shaam Converge CMC-H2H, Service Manual

Page: 80 / 140

Steam System Doesn’t Work
Is water connected the to the oven and turned on?
No
Connect and turn on water supply.
Yes
Does the water supply meet the dynamic and static
pressure specifications?
No
Correct any plumbing or supply
issue to the facility water supply and
retest.
Yes
If there is a water treatment system, is the water
flowing through the water treatment system?
No
Correct issues causing the water to
not flow through the water
treatment system. Change plugged
filters, inspect any pumps or storage
tanks, then retest after corrections.
Yes
Is the oven on and in a steam mode?
No
Turn the oven on and place it into a
steam mode. The steam element
will be on at the start of the steam
cycle followed by the water valve
activation.
Yes
Is the control board sending 12VDC to the Steam
element relay?
CB X2 9/10 for chamber 1
CB X2 7/8 for chamber 2
CB X2 5/6 for chamber
No
Verify the 12VDC input on the
control board X4 terminal. Check the
wiring connections and Molex
connectors. Replace the CB if
everything tests OK. Make any
corrections and retest the system.
Yes
Is the element drawing at approximately 1.5 amps?
No
Check voltage to the relay. Make
sure correct line voltage is supplied
to the COM and NO connections on
the relay and follow the wiring back
TB 16 and 22 to make any
corrections. If all voltages are good,
then replace the steam element
relay.
Yes
The steam element is working, continue.
No
If there is no steam production,
move to next step to test water
circuit.
Yes
Is the control board sending 12VDC to the Steam
relay?
Chamber one is CB X1 5/6
Chamber two is CB X1 3/4
Chamber three is CB X1 1/2
No
Verify the 12VDC input on the
control board X4 terminal. Check the
wiring connections and Molex
connectors. Replace the CB if
everything tests OK. Make any
corrections and retest the system.
Yes