Tosot U-match Series User Manual

DC Inverter U-match Series for R410A Unitary Split Air Conditioner
26
The following situations are not operation failures.
Problem Time of occurrence Cause
Mist comes from the air
conditioner.
During operation.
If the unit is running under
high humidity, the wet air in
the room will be quickly
cooled down.
The air conditioner
generates some noise.
System switches to
heating mode after
defrosting.
Defrosting process will
generate some water,
which will turn to water
vapor.
The air conditioner is
buzzing at the beginning of
operation.
Thermostat will be buzzing
when it starts working.
The
noise will become weak
1min later.
Dust comes from the
air conditioner.
When the unit is turned on,
it purrs.
When the system is just
started, the refrigerant is
not stable. About 30s later,
the purr of the unit
becomes low.
About 20s after the unit
first enables the heating
mode or there is refrigerant
brushing sound when
defrosting under heating.
It’s the sound of 4-way
valve switching direction.
The sound will disappear
after the valve changes its
direction.
There is hissing sound
when the unit is started or
stopped and a slight
hissing sound during and
after operation.
It’s the sound of gaseous
refrigerant that stops
flowing and the sound of
drainage system.
There is a sound of
crunching during and after
operation.
Because of temperature
change, front panel and
other components may be
swelled up and cause
abrasion sound.
There is a hissing sound
when the unit is turned on
or suddenly stopped during
operation or after
defrosting.
Because refrigerant
suddenly stops flowing or
changes the flow direction.
The unit starts operation
after being unused for a
long time.
Dust inside the units come
out together with the air.

Tosot U-match Series Specifications

General

Brand	Tosot
Model	U-match Series
Category	Air Conditioner
Language	English