Gree GC201808-III, Service Manual

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GREE GMV5 HR HEAT RECOVERY UNITS
167
Fault
code
Fault
Possible reasons
Solution
Primary reason Secondary reason Tertiary reason
Description
Confirmation
method
Description
Confirmation
method
Description
Confirmation
method
E4
High exhaust
temperature
protection
5. Wrong
refrigerant is
injected.
Stop the whole
system. Test
the system's
balance
pressure 20
minutes later
and convert the
pressure into
the
corresponding
saturation
temperature.
Compare it
with the
outdoor
ambient
temperature. If
the difference
is larger than
5°C
(
9
°F)
, it is
exceptional.
—— —— —— ——
Discharge
existing
refrigerant
and inject the
correct
refrigerant as
required.
6. Exhaust
temperature
sensor
failure
—— —— ——
Replace the
temperature
sensor or
main board.
7. The
ambient
temperature
exceeds the
scope of
temperature
required for
safe
operation.
——
The outdoor
ambient
temperature
exceeds
50°C
(
122
°F)
.
Measure the
ambient
temperature.
—— ——
It is a normal
phenomenon
caused by the
protection
function.
Fault
code
Fault
Possible reasons
Solution
Primary reason Secondary reason Tertiary reason
Description
Confirmation
method
Description
Confirmation
method
Description
Confirmation
method
E2
Low
exhaust
temperature
protection
1. The
ODU's
electronic
expansion
valve is
not
working
properly.
When the
system is
working in the
heating mode
and the ODU's
electronic
expansion valve
is opened to
100PLS, the
intake 1.2 The
controlling
heating
electronic
expansion
of the main
board or
the
electronic
expansion Reset the
ODU.
Listen to
the sound
and touch
the tube to
see if the
electronic
expansion
valve is 1.2.1 The
control
wire of the
electronic
expansion
valve is
not
connected
to the main
board.
Manual
check
Connect
the
electronic
expansion
valve's
control wire
to the main
board.