Troubleshooting (continued) – A.J. Antunes & Co MS-250 9100439 User Manual
Page 12
12
P/N 1010984 Rev. D 03/12
problem
possible Cause
Corrective action
Unit heats but there is little or no
steam produced
and/or
The product requires more steaming
than usual.
Water Line Valve is closed (MS-250).
Check that the Water Line Valve is open.
Filter Strainer is restricted.
Check and clean the Filter Strainer as described in
the Maintenance section of this manual.
Quick Disconnect is not fully engaged at rear of the
unit or is damaged (MS-250).
Remove and reengage the Quick Disconnect firmly
until a click is heard. Replace if damaged.
Low or no water pressure in the water line (MS-250). Remove the Quick Disconnect Insert from the rear
of the unit. While holding over an empty cup, press
the white plastic tip. Strong, steady water flow
should be noted. If so, reengage firmly into unit. If
not present, or pressure is low, contact your mainte-
nance person or plumber.
Improper water pressure to unit (MS-250).
Verify that a Water Pressure Regulator is installed
and set to 20–25 psi.
Unit is not being cleaned properly.
Clean unit daily and monthly as described in the
Maintenance section of this manual.
Programming and/or SHO, H2O values were adjusted/
changed improperly.
Reprogram the SHO and H2O values as described in
the Programming section of this manual.
Insufficient or excessive calcium/mineral deposits on
the Generator surface.
Verify that thin layer of calcium/mineral deposits
is present on the Generator surface. Refer to the
Maintenance section of this manual.
Generator surface is bare.
Generator surface must have a thin calcium/
mineral coating for proper steaming. Refer to the
Maintenance section of this manual.
Generator Steam Ports are restricted.
Clean the Steam Ports as described in the
Maintenance section of this manual.
Generator Cover is warped or loose.
Verify that the Generator Cover Wing Nut is tight.
If noticeable steam escapes around the Generator
Cover, replace the cover.
Generator Diffuser is missing.
Install Generator Diffuser or replace if missing.
Generator surface temperature is too low.
Verify Generator surface temperature to be 380–
420°F (193–215°C).
Excessive condensation in Food
Compartment.
Water pressure is too high (MS-250).
Verify that the Water Pressure Regulator is set to
20–25 psi. Adjust accordingly.
Programming and/or SHO and H2O values were
adjusted improperly.
Reprogram the SHO and H2O values as described in
the Programming section of this manual.
Steam coming out around top covers
or sides.
Generator Cover’s Wing Nut is loose.
Tighten Wing Nut.
Generator Cover is warped.
Replace Generator Cover.
Unit floods overnight and/or continues
to steam even when in idle mode.
Solenoid Valve is leaking due to debris trapped inside
the plunger (MS-250).
Attempt to flush the debris out of the valve by rap-
idly operating the unit on a number of single shot
cycles and then letting it rest. If the unit still leaks,
disassemble the Solenoid Valve and clean out the
plunger. Reassemble unit and test. If a leak is still
present, replace the Solenoid Valve. Contact your
maintenance person or Authorized Service Agency.
Solenoid Valve is installed incorrectly (MS-250).
If the Solenoid Valve was replaced, verify that the
“IN” and “OUT” labels on the valve correspond to
the water flow.
There is no pre-strainer or filter on the water line just
before the unit (MS-250).
Equipment was supplied with a strainer. If
missing, install strainer.
TroubleShooTinG (continued)