172-65702M-04 (SQ-C01) 10 Dec 2020
37
Troubleshooting
Be sure to use only the recommended components when repairing the
unit and its components, and NEVER attempt to modify the unit in any
way. Failure to observe these precautions may result in damage to the
unit or burns or other injury due to malfunction or the discharge of fluids.
CAUTION
Do not apply excessive force to the unit, pipings, and peripheral piping.
Failure to do so may result in injury or deformation of the device.
CAUTION
When disassembling or removing the unit, wait until the internal pressure
equals atmospheric pressure and the surface of the unit has cooled to
room temperature. Disassembling or removing the unit when it is hot or
under pressure may lead to discharge of fluids, causing burns, other
injuries or damage.
CAUTION
When all the piping work is completed based on the system flow
diagram, inspect once again that all the piping connections and
internal G threaded connectors are properly tightened, gaskets have
been installed and that no parts or connections are loose. Failure to do
so may result in burns or other injury from discharge of fluids.
CAUTION
Make sure to wear protective gear such as a helmet, safety glasses,
long-sleeve shirt, heat-resistant gloves, protective footwear, etc.
Failure to do so may result in burns or injuries.
CAUTION
When 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 performing the
remedy below, contact TLV.
* Refer to individual instruction manuals for further details on components mentioned in this
manual.
Problem
Cause
Diagnosis
Remedy
No hot water is
discharged
Valves on piping are
closed
Check valves
Operate the valve in
accordance with the
operating procedures.
The strainer on the
cold inlet piping is
clogged
Check the strainer on
the cold inlet piping
Clean the strainer on
the cold inlet piping
The adjustment valve
at the hot water side in
the mixing valve is
clogged
Confirm that the water
temperature at the
outlet of the heat
exchanger is high.
Replace with a new
mixing valve
Temperature
does not rise
as required
Water
temperature is
unstable
Supply steam pressure
is decreased or stem
supply quantity is
insufficient
Check the settings of
the pressure reducing
valve (at the water
supply side and in the
unit)
Set the maximum
steam pressure that
can be supplied below
0.7 MPaG.
Set the pressure of the
pressure reducing
valve in the unit
designated pressure.
Supply steam pressure
is unstable
Check the steam
pressure
Check for pipe
leakage
Make sure that steam
with a pressure of 0.6
MPaG or less can be
obtained stably before
the unit.
Continued on the next page
