80
7
Troubleshooting
Item Condition Cause Measure
7
Although both pump and
compressor are running, oil
cannot be cooled.
(1) There is an obstacle near the air
intake/exhaust port.
Do not place any object that blocks
ventilation at 500 mm or shorter
distance from the air intake/exhaust
port.
(2) The air filter is clogged. Clean the air filter.
(3) The unit is running under capacity
suppressing control, because the
room temperature is high.
Check the capacity in the operating
temperature range with the catalog,
and select a model with appropriate
capacity.
(4) Heat load is large.
(5) The oil viscosity is high.
The higher the oil viscosity, the lower
the cooling capacity.
Select a model with appropriate
capacity.
(6) The temperature setting is high.
Change the temperature setting to an
appropriate temperature.
(7)
If the exhaust air temperature
is almost equal to the room
temperature although the
compressor is in operation, the
refrigerant gas is low.
Contact Nearby Service Network.
8
The operation settings cannot be
changed.
(1) If “---” appears on the data
display, the temperature sensor
corresponding to the selected
operation mode is not connected.
Connect the required temperature
sensor before changing the operation
settings.
The machine temperature tuning
thermistor option is required for
machine temperature tuning control.
(2) If “---” instantaneously appears
when the [ENT] key (at the right
end of the control panel) is pressed,
the protect switch is set to ON.
Turn OFF the protect switch on the
control board.
9
Alarm output operation ([64]-
[65]) is different from that of
conventional signal output.
(1) The alarm output signal connection
has been partially changed
depending on the series.
The [60]-[63] outputs are compatible
with the AKS5 and AKZ6 series, but
after the 7 series, signal operations
and connections of the [64]-[65]
outputs have been changed.
00_PB00540A_M10.indb 80 2023/08/09 12:59:04
To Next Page
Loading...
