Gree GMV-PD140W/NAB-K

109
DC Inverter Multi
VRF Service Manual
2.12 Superheat Protection of Radiator
No
E5 is displayed on
the wired controller
Monitoring
display
Nixie tube of
mainboard
Yes
Yes
Yes
Superheat protection
of radiator
P8 is displayed
Is radiating of outdoor
unit in good state?
If short circuit happens to
air outtake and air return
of outdoor unit, the
radiating effect will
be worse.
No
If radiator is dirty or
blocked, the radiating
will be worse.
It is recorded and
reflected
.
Is radiator dirty or blocked?
No
Is module worse?
If the module is loose. its
temperature will be too
high,which may burn
the module.
No
Is silica gel of module even?
If radiating silica gel is
too thick, it will affect
radiating or cause misjudge
due to uneven temperature,
or burn the module.
Yes
No
Does silica gel of module
meet the require ments?
Yes
Yes
If radiating silica gel is
too thick, it will affect
radiating or even burn
the module.
Check if
temperature sensor and voltage
dividing re sistance
are normal.