172-65605M-14 (SQ2/SQ4/SQ6) 10 Dec 2019
39
Troubleshooting
If the unit fails to operate properly, use the following table to locate the cause and
remedy.
If it is not possible to resolve the problem even after carrying out the remedy below,
contact TLV.
Problem
Cause
Diagnosis
Remedy
The display
does not light
up
Power is not
supplied.
Check the power supply
indicator.
Supply power to the
control panel at the
applicable voltage for the
unit.
(Standard models: 100 V
AC, Oceania models: 240
V AC)
Operation
does not
start after
touching the
START
button
5 seconds have
not passed after
starting operation.
Wait for 5 seconds.
The water supply
system valve is
closed. The flow
rate is below the
required amount.
Check the water flow on
the touch panel
Open the valve.
Increase the water
amount.
5 seconds have
not passed after
AL1 triggered.
Check the high
temperature alarm on the
touch panel.
Wait until AL1 is resolved.
Investigate the cause for
AL1 to be triggered.
Temperature
sensor is broken.
Check that the outlet
temperature on the touch
panel is displayed as "0".
Replace with a new
temperature sensor.
Air is not
supplied to the
control valve.
Check the pressure of
the regulator.
Supply the required air
pressure.
(When the pneumatic
control valve is used.)
The sequencer
is faulty.
An error message appears
on the touch panel.
Replace the internal
sequencer.
Temperature
does not
rise as
prescribed
Steam supply
pressure is
reduced or
insufficient
steam amount.
Check the settings for the
pressure reducing valve
(not included with the unit).
Set to the maximum
steam pressure possible
to be supplied below
0.6 MPaG.
Check the steam main
valve.
Open the main valve.
Check for clogging in piping. Remove the clog.
Check the pressure loss
of the piping.
Make sure a steam supply
pressure of 0.6 MPaG is
obtainable up until the unit.
Air supply
pressure to the
control valve is
low.
Check the air supply
pressure to the control
valve.
Supply the required air
pressure.
(When the pneumatic
control valve is used.)
In case of an abnormality, install a safety fence or restrict access to
the room with a sign stating "Authorized personnel only." etc. to
prevent personnel unauthorized for the unit (including those who
have not received the relevant safety education) touching the
components. When doing so, stop the supply of steam, electrical
power, water and air. Failure to prevent the access of unauthorized
personnel may result in burns, electric shock, injury, or falls.
CAUTION
