Daikin AKZ8 Series, Instruction Manual

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39
Tr
oub
leshooting
Maintenance
When an alarm is activated (To cancel the alarm, turn OFF the power supply, and then turn it ON again.)
Alarm list
Alarm
code
Alarm
∗
level
Description Cause Corrective action
Heater overheat (S4B1:CN4)
(For built-in heater model only)
DC fan motor lock error
High pressure error
(High-pressure pressure
switch (S3PH:CN6),
Activated at 4.1 MPa)
Compressor high temperature
error (Discharge pipe
thermostat Th6, Activated at
approx. 120˚C)
(Compressor head
thermostat (S2B:CN5),
Activated at 115˚C)
Compressor (M2C) lock
System error
∗
Alarm level 1: Compressor, pump and fan stop.
Alarm level 2: Only compressor stops.
Pump over-current relay
(S1B:CN3) is activated.
AKZ148, 328, 438: 2.5A
AKZ568, 908: 3.6A
Optional protection device is
activated. (OP.)
Air temperature thermistor error
(Th5: Machine temperature tuning thermistor)
(Th3: Room temperature thermistor)
Pump outlet oil temperature error (Th10)
Inlet oil temperature is higher
than 60˚C.
AA 2
A6 2
E1 1
E3 2
E5 2
E6 2
Error in electromagnetic valve
for hot gas
E9 2
EH 1
EJ 1 or 2
H1 2
FE 1
FH 2
1) AKZ type:
No oil flow
2) AKZJ type:
Insufficient oil level in tank
1) Fault of the DC fan motor
1) Internal parameter setting is invalid.
3) The air filter is clogged, or the condenser is dirty.
4) Any factor other than the above
3) The air filter is clogged, or the condenser is dirty.
3) The pump motor wiring has a break. (Open-phase)
1) The pump outlet oil temperature is higher than 65˚C.
2) Fan motor-control board communication
error
1) The oil temperature or room temperature
is higher than the specified range.
2) There is an obstacle near the air
intake/exhaust port.
1) The oil temperature or room temperature
is higher than the specified range.
2) There is an obstacle near the air intake/
exhaust port.
1) Fault of the compressor
(Replace the compressor.)
1) The pump is overloaded with high-viscosity
oil.
4) A foreign object is caught in the pump, or
the pump motor has a fault.
1) The air temperature thermistor required
for control is disconnected or short-circuit-
ed.
2) There is an obstacle near the air intake/exhaust
port, resulting in cooling capacity deterioration.
2) Because the power supply voltage falls
below the operating range, the pump
current has increased.
1) The optionally-connected protection device
(or factory-connected device, if it is
incorporated in the unit) has been activated.
1) The heating value of the main machine has
exceeded the cooling capacity of the Oil
Cooling Unit. (Improper model selection)
Check if the oil circuit is properly connected and the pump
normally operates.
Check the connector insertion and wire break.
Replace the control board.
Do not place any object that blocks ventilation at 500 mm or
shorter distance from 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.
Check if the power supply voltage is not lower than the
specified operating range. Check for an instantaneous power
supply voltage drop at startup of peripheral equipment.
Identify the thermistor that indicates the error in the monitor
mode on the operation panel (“99.9” is displayed), and check the
thermistor wiring.
If the unit is properly installed and the compressor runs at
100% capacity (capacity setting can be checked in the monitor
mode), select a model that provides larger cooling capacity.
Do not place any object that blocks ventilation at 500 mm or
shorter distance from the air intake/exhaust port.
Use an operating fluid that provides 4 to 200 mm 2 /s viscosity in
the specified oil temperature range.
Check the condition detected with the relevant protection device.
Check if the oil piping system is not blocked (fully closed).
Clean the air filter. (See “Maintenance/Inspection” on page .)
Refill oil.
Replace the DC fan motor.
Replace the control board.
Use the unit within the specified operating range.
Contact DAIKIN Contact Center.
5) The hot gas circuit is clogged. The capillary piping needs to be replaced.
Use the unit within the specified operating range.
Replace the compressor.
The electromagnetic valve coil needs to be replaced.
Replace the pump motor.
Replace the pump motor.
37
Clean the air filter. (See “Maintenance/Inspection” on page .)
37
1) The electromagnetic valve coil is burnt out.
3) The electromagnetic valve or coil fails to operate.
Check that the electromagnetic valve coil is connected properly.
2) The electromagnetic valve coil is not con-
nected properly (not properly mounted to the
valve or inserted into the PCB connector)
The electromagnetic valve or coil needs to be replaced.
The PCB for electromagnetic valve needs to be replaced.
4) The PCB of the electromagnetic valve
has a defect.
Consult DAIKIN Contact Center.
6) The minimum opening setting for the elec-
tronic expansion valve is improper.
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