MN-35949 • Rev 04 • 06/16 • Combitherm® CT PROformance™ Series • Technical Service Manual • 79
Troubleshooting
Classic, Electric, Boiler-Free: No Steam Production — Steam at 212°F (100°C)
Is the convection
fan motor spinning?
Is the Steam Bypass Probe
B5 below the set point?
Is the Convection Element
Contactor K41 closed?
Is there line voltage being
supplied to terminals 2-4-6
on the K41/K44 contactors?
No
Yes
Is there line voltage
across terminals 1-3-5 on
the K41 contactor?
Is there voltage across
element loops at the
convection elements?
Replace the faulty
contactor(s).
No
Yes
No
Yes
No
Yes
The appliance will not call for steam production
until the B5 probe is below the set point. If the
B5 probe is reading incorrectly, test the probe
and replace the probe if necessary
No
Repair the wiring between the
contactors and the elements.
No
Yes
Are all element loops
drawing current?
Replace the faulty element
assembly.
No
Is the Steam Injection Solenoid
Y1 being energized?
Yes
Determine which line is
missing at the solenoid.
No
Yes
Is the Y1 solenoid valve opening?
Repair the wiring issue
between the main terminal
blocks 1-1, 6-1, 11-1 and
the K41 contactors.
Is water going through the
steam water flow control?
Yes
Is water being injected into
the fan wheel inside the
appliance?
Correct the obstruction
between the flow control
valve and the injection tube.
No
Inspect, clean, or replace
the steam water flow
control as necessary.
No
Check for voltage across the
coil of K41. If voltage is present,
replace the faulty contactor. If
voltage is not present, determine
which leg is missing and correct:
A1 is L1 and it is supplied
to the K41 contactor from
the Control Board (CB)
terminal X02 pin 1.
Yes
A1 is L1 supplied from CB
terminal X04 pin 3
A2 is L2 supplied from
Y3/A2 which is supplied
from terminal block 27-17
Replace the faulty solenoid.
No
Yes
The appliance should begin
producing steam in 5
minutes.
Yes
See "Convection Motor is
Not Spinning".
A2 is L2 and it is supplied
to the K41 convection
element contactor from the
Cavity High Limit Reset N7
terminal 11. Reset the High
Limit if it is tripped.
Содержание COMBITHERM CT PROFORMANCE 10-10E
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