Troubleshooting; When The Unit Operation Seems Abnormal - Daikin AKZ9 Series Instruction Manual

PIM00318A_EN.fm Page 38 Tuesday, October 26, 2010 12:37 PM

Troubleshooting

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When the Oil Cooling Unit does not work well, first check the following points.
If the problem persists, contact DAIKIN Contact Center with information on the following 1), 2) and 3) items.
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(For phone/fax number and address of DAIKIN Contact Center, see the back cover.)
1) Machine name (Full Model No.)
2) Manufacture No. (MFG. No.)
3) Condition of the Oil Cooling Unit (as closely as possible)
When the unit operation seems abnormal although no alarm is activated
Item Condition
The unit does not run at all.
1
(The POWER lamp on the control panel is unlit.)
2 The pump does not run.
Oil does not flow, although the pump is running.
3
Because the oil circulation quantity is insufficient,
the pump sound level is large.
The compressor does not run, although the
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pump is running.
Although both pump and compressor are
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running, oil cannot be cooled.
6 Operation setting cannot be performed.
Alarm output operation ([64] or [65]) is different
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from that of conventional signal output.
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NOTE: Customers should not perform any
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See page .
Cause
1) The main power supply is OFF, or the power
cable (L1, L2) is disconnected.
2) The connector for the transformer disconnected,
or the thermal fuse of the transformer melted.
1) The remote control input ([10]–[11]) is OFF.
2) The unit has been set to the operation lock mode.
(With the factory setting, the operation Lock mode is selected.)
1) The pump suction pipe connection is loose.
2) The suction strainer is clogged.
3) The oil level in the oil tank has decreased.
4) Because of a large pressure loss in the oil
discharge pipe, the pump relief valve is activated.
5) Because of a large pressure loss in the oil suction
pipe, cavitation has occurred with the pump.
1) The compressor is stopped under temperature control.
2) The compressor restart prevention timer has
been activated.
3) The low oil temperature protection device has been
activated. (Inlet oil temperature is 2˚C or lower.)
4) The low ambient temperature protection device has
been activated. (Room temperature is –2˚C or lower.)
5) The capacity setting is 0% (Mode 9).
1) There is an obstacle near the air intake/exhaust port.
2) The air filter is clogged.
3) The unit is running under capacity suppressing
control, because the room temperature is high.
4) Heat load is large.
5) The temperature setting is high.
6) If the exhaust air temperature is almost equal to
the room temperature although the compressor is
in operation, the refrigerant gas is running short.
1) If "---" appears on the data display, the
temperature sensor corresponding to the
selected operation mode is not connected.
2) If "---" instantaneously appears when the [ENT]
key (at the right end of the control panel) is press-
ed, the protect switch is set to ON.
1) The alarm output signal connection has been
partially changed.
repairs as it is dangerous. Our
service person will make repairs.
Corrective action
Check if the power cable is connected to the
power supply terminal.
Check the wire connection of the transformer. If
the fuse was melted, consult DAIKIN center.
Check the connection of the remote control input.
Cancel the Lock mode on the control panel.
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(See page .)
Check the packing of the pipe, and re-tighten it securely.
Clean the suction strainer.
If the oil in the oil tank is dirty, replace the oil.
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(See page .)
Refill oil into the oil tank.
Increase the oil pipe diameter, and shorten the
pipe length.
– – –
Check if the compressor starts after elapse of the
timer preset time.
Check if the compressor normally operates at
5˚C or higher oil temperature.
Check if the compressor normally operates at
0˚C or higher room temperature.
Change the operation mode to an appropriate setting.
Remove the obstacle.
Clean the air filter.
Check the capacity in the operating temperature
range with the catalog, and select a model with
appropriate capacity.
Change the temperature setting to an appropriate temperature.
Re-fill refrigerant.
Connect the corresponding temperature sensor.
Turn OFF the protect switch (SW1) on the control
board.
The [60] to [63] outputs are compatible with
conventional models (AKS5 and AKZ6 series).
With the AKZ8 and AKZ9 series, however, signal
operations and connections of the [64] and [65]
outputs have been changed.