Page 1 Global Suppliers of Premium Hydraulic Components UK sales for Daikin Hydraulics T: +44(0)1172 130042. E: sales@zeushydratech.com. W: zeushydratech.com...
Page 2 PB00540A (MODEL 10) (MODEL 10) Circulation type Circulation type AKZ14A AKZ14A AKZ32A AKZ32A AKZ43A AKZ43A AKZ56A AKZ56A AKZ90A AKZ90A...
Page 3 Preface We would like to express our deepest gratitude for your continuous custom. We have developed and pleased to present the Oil Cooling Unit (Model 10) Service Manual. We Daikin provide an extensive lineup characterized high-accuracy temperature control and needs for energy saving with the Oil Cooling Unit.
Page 4: Table Of Contents
3. AKZ14A–43A-T, AKZ14A–43AT500 …………… 46 1. Principle of Oil Cooling Unit …………………… 8 4. AKZ56A/90A (-B) (-C) (-046) (-048) (-500) …… 48 2. List of Basic Performance/Specifications ……… 10 5. AKZ56A/90A-H, AKZ56A/90AH500 …………… 50 2-1. Specifications (AKZ14A, 32A) …………… 10 6.
Page 5 OIL COOLING UNIT(MODEL 10) Service Manual □ Disassembling Procedure ……… 118 1. AKZ14A–43A …………………………………… 118 2. AKZ56A, 90A …………………………………… 133 □ Replacement Procedure ………… 149 1. Replacing Control Board ……………………… 149 2. Procedure for Replacing EEV (for main circuit) and MOV (for hot gas) ……………………… 150 □...
Page 6: Safety Precautions
SAFETY PRECAUTIONS Be sure to observe the precautions shown below. The following section describes precautions to prevent personal injury or damage. Hazardous situations, which can occur due to mishandling of the equipment, are classified by the safety alert symbols shown below. DANGER WARNING CAUTION...
Page 7 WARNING Follow standards to conduct wiring work. If refrigerant leaks, provide thorough ventilation. Conduct electric wiring in If refrigerant leakage occurs while in accordance with respective work, be sure to ventilate the workpiece. national and regional standards. If a large quantity of refrigerant Improper wiring may result in penetrates the workpiece, anesthetic MUST...
Page 8 CAUTION Mount a flow switch to the main machine. Check to be sure the oil piping. If the oil-pump system malfunctions, no Prior to or immediately after the connection oil will be fed to the main machine. In of the oil cooling unit, check to be sure the this case, the unit normally detects this oil piping on the main machine side is not malfunction to give an alarm.
Page 9: List Of Models
List of Models Type Page Listed Type Page Listed Model Name Model Name Optional Standard Wiring Piping Optional Standard Wiring Piping Specification Specification Diagram Diagram Specification Specification Diagram Diagram AKZ14A AKZ14A-C AKZ32A AKZ32A-C CE/UKCA Standard type AKZ43A Safety Standard AKZ43A-C compatible AKZ56A AKZ56A-C...
Page 10 14, 32, 43, 56, 90 and others Special specifications Series symbols (model change symbols) (specified packing, optional communications, etc.) A: 10 series Options and their combinations ■ AKZ 10 Oil Cooling Unit (Circulation type) Optional With Compliance With With Different...
Page 11: Standard Specifications
Standard Specifications １ Principle of Oil Cooling Unit Room thermistor (*4) Inlet oil thermistor (*1) Outlet oil thermistor (*2) Machine body thermistor (*5) Returned oil thermistor (*3) (Optional) (Optional) Pressure reducing mechanism Oil outlet (Oil) Relief valve Air intake Bypass Machine tool mechanism Oil inlet...
Page 12 ●Standard Specifications ■Details of piping system Control Electronic expansion board valve for main circuit Oil outlet Outlet oil thermistor Electronic expansion valve outlet thermistor Filter Room thermistor Plug stop oil drain Condenser Motor operated valve for hot gas Low-pressure gauge port pump Condenser thermistor...
Page 13: List Of Basic Performance/Specifications
Standard Specifications ２ List of Basic Performance/Specifications 2-1. Specifications (AKZ14A, 32A) Oil Cooling Unit equivalent horsepower (HP) AKZ14A AKZ32A Model name Stan Different- Stan Different- -B -C -J -B -C -J -dard voltage -dard voltage Cooling capacity (50/60 Hz) 1.3/1.4 2.8/3.2 Heater (at 200 V) –...
Page 14 *9: No line breaker is included in this product. It must be separately provided by the customer. *10: The yellow line on the tank liquid level gauge shows the highest oil level, and the red line shows the lowest liquid level.
Page 15: Specifications (Akz43A)
Standard Specifications 2-2. Specifications (AKZ43A) Oil Cooling Unit equivalent horsepower (HP) AKZ43A Model name Stan Different-voltage -dard Cooling capacity (50/60 Hz) 3.8/4.3 Heater (at 200 V) – – Power supply 3-phase, AC200/200, 220 V 50/60Hz Main circuit 3-phase, AC200/200, 220 V 50/60Hz Circuit voltage Operation circuit...
Page 16 *9: No line breaker is included in this product. It must be separately provided by the customer. *10: The yellow line on the tank liquid level gauge shows the highest oil level, and the red line shows the lowest liquid level.
Page 17: Specifications (Akz56A, 90A)
Standard Specifications 2-3. Specifications (AKZ56A, 90A) Oil Cooling Unit equivalent horsepower (HP) AKZ56A AKZ90A Model name Stan Different- Stan Different- -B -C -J -B -C -J -dard voltage -dard voltage Cooling capacity (50/60 Hz) 5.0/5.6 8.0/9.0 Heater (at 200 V) –...
Page 18 *9: No line breaker is included in this product. It must be separately provided by the customer. *10: The yellow line on the tank liquid level gauge shows the highest oil level, and the red line shows the lowest liquid level.
Page 19: Operating Limits
Standard Specifications ３ Operating Limits 3-1. Operating Range The Oil Cooling Unit has its operating limits. Be sure to use the Oil Cooling Unit in the range shown below. Oil inlet temperature (℃) 3-2. Applicable Oil Since this Oil Cooling Unit is designed for lubricating oils and hydraulic oil (of mineral oil base), the following oil (liquid) is not applicable.
Page 20: Wiring Diagrams
Wiring Diagrams ●Wiring Diagrams １ AKZ14A–43A (-C) (-T) ■Wiring Diagrams C：PH207885...
Page 21: Akz14A-43A- (C) (T) 500
Wiring Diagrams ２ AKZ14A–43A- (C) (T) 500 ■Wiring Diagrams C：PH207413...
Page 22: Akz14A-43A-B
●Wiring Diagrams ３ AKZ14A–43A-B ■Wiring Diagrams C：PH207909...
Page 23: Akz14A-43Ab500
Wiring Diagrams ４ AKZ14A–43AB500 ■Wiring Diagrams C：PH207571...
Page 24: Akz14A-43A-H
●Wiring Diagrams ５ AKZ14A–43A-H ■Wiring Diagrams C：PH207911...
Page 25: Akz14A-43Ah500
Wiring Diagrams ６ AKZ14A–43AH500 ■Wiring Diagrams C：PH207559...
Page 26: Akz14A-43A-046
●Wiring Diagrams ７ AKZ14A–43A-046 ■Wiring Diagrams C：PH208107...
Page 27: Akz14A-43A-048
Wiring Diagrams ８ AKZ14A–43A-048 ■Wiring Diagrams C：PH207916...
Page 28: Akz56A (-C) (-T)
●Wiring Diagrams ９ AKZ56A (-C) (-T) ■Wiring Diagrams C：PH208112...
Page 29 Wiring Diagrams AKZ56A- (C) (T) 500 ■Wiring Diagrams C：PH207712A...
Page 30: Akz56A-B
●Wiring Diagrams AKZ56A-B ■Wiring Diagrams C：PH208114...
Page 31: Akz56Ab500
Wiring Diagrams AKZ56AB500 ■Wiring Diagrams C：PH207723A...
Page 32: Akz56A-H
●Wiring Diagrams AKZ56A-H ■Wiring Diagrams C：PH208116...
Page 33: Akz56Ah500
Wiring Diagrams AKZ56AH500 ■Wiring Diagrams C：PH207816A...
Page 34: Akz56A-046
●Wiring Diagrams AKZ56A-046 ■Wiring Diagrams C：PH208117...
Page 35: Akz56A-048
Wiring Diagrams AKZ56A-048 ■Wiring Diagrams C：PH208118...
Page 36: Akz90A (-C) (-T)
●Wiring Diagrams AKZ90A (-C) (-T) ■Wiring Diagrams C：PH208113...
Page 37 Wiring Diagrams AKZ90A- (C) (T) 500 ■Wiring Diagrams C：PH207713A...
Page 38: Akz90A-B
●Wiring Diagrams AKZ90A-B ■Wiring Diagrams C：PH208120...
Page 39: Akz90Ab500
Wiring Diagrams AKZ90AB500 ■Wiring Diagrams C：PH207724A...
Page 40: Akz90A-H
●Wiring Diagrams AKZ90A-H ■Wiring Diagrams C：PH208122...
Page 41: Akz90Ah500
Wiring Diagrams AKZ90AH500 ■Wiring Diagrams C：PH207817A...
Page 42: Akz90A-046
●Wiring Diagrams AKZ90A-046 ■Wiring Diagrams C：PH208123...
Page 43: Akz90A-048
Wiring Diagrams AKZ90A-048 ■Wiring Diagrams C：PH208124...
Page 44 MEMO...
Page 45: Piping Diagrams
Piping Diagrams １ AKZ14A–43A (-B) (-C) (-046) (-048) (-500) Part Name Symbol Function This compressor is a swing compressor with a built-in DC motor. The ① Compressor compressor is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used ②...
Page 46: Akz14A-43A (-B) (-C) (-046) (-048) (-500)
●Piping Diagrams ■AKZ14A–43A (-B) (-C) (-046) (-048) (-500) C：PH400494...
Page 47: Akz14A-43A-H, Akz14A-43Ah500
Piping Diagrams ２ AKZ14A–43A-H, AKZ14A–43AH500 Part Name Symbol Function This compressor is a swing compressor with a built-in DC motor. The ① Compressor compressor is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used ②...
Page 48 ●Piping Diagrams ■AKZ14A–43A-H, AKZ14A–43AH500 C：PH400505...
Page 49: Akz14A-43A-T, Akz14A-43At500
Piping Diagrams ３ AKZ14A–43A-T, AKZ14A–43AT500 Part Name Symbol Function This compressor is a swing compressor with a built-in DC motor. The ① Compressor compressor is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used ②...
Page 50 ●Piping Diagrams ■AKZ14A–43A-T, AKZ14A–43AT500 C：PH400506...
Page 51 Piping Diagrams ４ AKZ56A/90A (-B) (-C) (-046) (-048) (-500) Part Name Symbol Function This compressor is a swing compressor with a built-in DC motor. The ① Compressor compressor is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used ②...
Page 52: Akz56A/90A (-B) (-C) (-046) (-048) (-500)
●Piping Diagrams ■AKZ56A/90A (-B) (-C) (-046) (-048) (-500) C：PH400512...
Page 53: Akz56A/90A-H, Akz56A/90Ah500
Piping Diagrams ５ AKZ56A/90A-H, AKZ56A/90AH500 Part Name Symbol Function This compressor is a swing compressor with a built-in DC motor. The ① Compressor compressor is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used ②...
Page 54 ●Piping Diagrams ■AKZ56A/90A-H, AKZ56A/90AH500 C：PH400515...
Page 55: Akz56A/90A-T, Akz56A/90At500
Piping Diagrams ６ AKZ56A/90A-T, AKZ56A/90AT500 Part Name Symbol Function This compressor is a swing compressor with a built-in DC motor. The ① Compressor compressor is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used ②...
Page 56 ●Piping Diagrams ■AKZ56A/90A-T, AKZ56A/90AT500 C：PH400514...
Page 57: Layout Of Functional Parts
Piping Diagrams ７ Layout of Functional Parts – – – – – – Yellow line Red line...
Page 58 ●Piping Diagrams Part Name Function This compressor sucks in and compresses low-temperature ① Compressor and -pressure gas refrigerant generated by evaporator to make it into high-temperature and -pressure liquid refrigerant. Used to make the high-temperature and -pressure ② Condenser gas refrigerant generated by the compressor to turn to high-temperature and -pressure liquid state.
Page 59 Piping Diagrams – Yellow line Red line...
Page 60 ●Piping Diagrams Part Name Function This compressor sucks in and compresses low-temperature ① Compressor and -pressure gas refrigerant generated by evaporator to make it into high-temperature and -pressure liquid refrigerant. Used to make the high-temperature and -pressure ② Condenser gas refrigerant generated by the compressor to turn to high-temperature and -pressure liquid state.
Page 61: Control Panel
Selector button It is used for changing the modes. It is used to decrease the value of mode No./data No./data (-1/- Down button 0.1). If it is pressed and held for a while, the value is -10 (-1). Operation ⑤...
Page 62 ●Control Panel Nine operation modes listed in Table below are available on the control panel. For normal operation, use only 6 modes (1-4,8,9). Other modes 5, 6, and 7 may interfere with the operation of the Oil Cooling Unit. Therefore, before using, be sure to thoroughly understand the functions of these modes.
Page 63: Operation Procedure By Mode
Control Panel ２ Operation Procedure by Mode 2-1. Normal mode When the power supply turns ON, the system will be automatically brought to this mode. This mode is used to display the following contents according to the status of the Oil Cooling Unit. Status Display of control panel Remarks...
Page 64: Operation Setting Mode
●Control Panel 2-2. Operation Setting Mode This mode is used to make settings of operation mode and target temperature. Furthermore, if the malfunction prevention switch on the main board turns ON, no operation mode settings will be made. In this case, turn OFF this switch to make these settings. [Setting procedure] (1) Turn ON the power supply.
Page 65: List Of Operation Modes
Control Panel ■List of operation modes Setting item Mode No. Settable range AKZ Series Inlet oil temperature under fixed temperature control (*1) 5.0 to 50.0℃ (Factory set to 20.0℃) Outlet oil temperature under fixed temperature control (*1) － (Not used) Inlet oil temperature offset value under room temperature tuning (Factory setting) control (*2)
Page 66: Monitor Mode
●Control Panel 2-3. Monitor Mode This mode is used to display temperatures detected by each sensor of Oil Cooling Unit and Inlet/Outlet status. Using the button makes it possible to select data No. Contents Data AKZ Series Machine temperature (Th-1) Outlet oil temperature (Th-2) Room temperature (Th-3) Inlet oil temperature...
Page 67: Parameter Setting Mode
Control Panel 2-6. Parameter Setting Mode This mode is used to make settings of the following parameters to determine the basic operation of Oil Cooling Unit. ○Setting of external output procedure when an alarm or warning occurs …n001 to n003 ○Setting of conditions for auto tuning …………………………………………n004, n005 ○Setting of gain rate for temperature control …………………………………n006 to n009 ○Setting of monitoring subject for temperature warning ……………………n010, n012, n014, n016, n018...
Page 68 － n003 Operation setting 2 for external signal input － n004 Setting of auto tuning end conditions 10.0 Setting of oil outlet drop temperature －－－－－－－－ n005 Setting of response coefficient for auto tuning 10.0...
Page 69 Control Panel (3) Parameter No. ○n001: External output when an alarm or warning occurs used to make setting of combination of output to each contact. First digit: Used to set the alarm output logic (60-61, 60-63) and warning output logic (66-67) of the signal terminal block.
Page 70 ●Control Panel ○n006–n009: Setting gain rate for temperature control ・n006: Control gain P (in the case of small temperature differential) ・n007: Control gain I (in the case of small temperature differential) ・n008: Control gain P (in the case of large temperature differential) ・n009: Control gain I (in the case of large temperature differential) Parameters n006 to n009 are used to make setting of gain for temperature control.
Page 71 Control Panel ○n036: Resetting alarm/warning history data Used for reset of alarm/warning history data. List of resetting parameter n036 alarm/warning history data Alarm history data reset 0001 Warning history data reset 0002 Reset all the above 0003 For n036, a power cycle is required to make the set parameter change effective. ○n037–n038: Not used Never change the setting of these parameters.
Page 72: Temperature Warning
●Control Panel (4) Temperature warning ■Outline of the function • As a special function of the Oil Cooling Unit, you can set up the “Temperature range warning” function. This function allows you to specify a desired temperature range within the Oil Cooling Unit operating range. When the control temperature exceeds the preset range, the unit informs you of the “Temperature range warning”...
Page 73 Control Panel ■About monitoring target and operation (a) (b) (c) settings * To avoid a temperature range warning during setting, input the following items (d) and (e) before setting (a), (b) and (c). (1) Set the “temperature range warning temperature (d)” with “monitoring target (a)” and “comparison target (b)” based on the following formula.
Page 74 ●Control Panel ■Parameter (d) (e) settings (3) Set the following “differential value (e)” to specify the reset temperature in order to release the temperature range warning. Return temperature or return temperature difference = Temperature range warning temperature (d) – (*5) Differential value (e) *5: However, when the comparison target (b) is “≤...
Page 75: Auto Tuning Mode
Control Panel 2-7. Auto Tuning Mode This mode is used to automatically compute controlled variables for PI control and set them with parameters n006 to n009. (1) Setting procedure Turning ON power supply: ①Turn ON the power supply. (The system will be automatically put into “normal mode”.) Auto tuning mode: ②...
Page 76 ●Control Panel Note) 1. Before putting the system into the auto tuning mode, be sure to set the operation mode (except for mode No. 9 while in operation setting mode) in order to determine the thermistor subject to control. 2. Initiate auto tuning from the state in which the room temperature is approximately equal to the oil temperature (i.e., stable state).
Page 77: Functions
Functions １ Operation Flowchart Turn ON the power supply. (Circuit Breaker: ON) *This step should be only Unlock the “operation lock” performed for the first operation. (The pump and fan start rotating.) (Not required to perform for the second operation and later) Initialize the motorized valve.
Page 78: Functions
●Functions ２ Functions Function Description When a malfunction occurs while in running, used to stop compressor or else for protection. Stop due to alarm is classified into the following two levels. Stop due to alarm ・Alarm level 1: All the compressor, pump, and fan stop operation. ・Alarm level 2: Only the compressor stops running.
Page 79 The table below shows the guideline of temperatures and pressures during normal running. Unit: ℃ Standard point (room temperature/ Reference point (room temperature/ oil temperature=35/35℃) oil temperature=25/25℃) Capacity command value=100% Capacity command value=10% ☆ 1 ☆ 1 Th-6 Th-7 Th-8 LP (MPa) Th-6 Th-7...
Page 80 ●Functions Function Description When high pressure shows an abnormal rise, used to stop only the compressor due to malfunction. ○ Stop due to detection by the thermistor of condenser (subject to all High pressure applicable models) protection function Actuating temperature: 62℃ or more ○Stop due to detection by the high-pressure switch (only on "-C"...
Page 81: List Of Alarms/Warnings
Functions ３ List of Alarms/Warnings When an alarm or warning occurs while in operation, the equipment will stop operation in progress and the status will be displayed as shown below. 1. In order to protect functional parts, the compressor, oil pump, fan, or else stops. 2.
Page 82: Troubleshooting
Check the wiring between the control control panel is unlit. disconnected or broken. board and the control panel. (1) The remote control input ([10]–[11]) Check the connection of the remote is OFF. control input. (2) The unit has been set to the Cancel the operation Lock mode on Pump/fan does not run.
Page 83 Troubleshooting Item Condition Cause Measure Do not place any object that blocks (1) There is an obstacle near the air ventilation at 500 mm or shorter intake/exhaust port. distance from the air intake/exhaust port. (2) The air filter is clogged. Clean the air filter.
Page 84: Equipment Data Checking Procedure
●Troubleshooting ２ Equipment Data checking Procedure Using the control panel to put the system into “special monitor mode” will acquire a variety of data on the current equipment. [Operation procedure] <Normal mode> While in normal mode (with the NORMAL lamp ON), press and hold the “...
Page 85: Troubleshooting According To Alarm Code
Radiator fin temperature (AKZ90A, AKZ56A-500, …Detailed data (26 data) to n3.26 AKZ90A-500 when an alarm occurs) Alarm code 4 (last but three) n0.10 Electric component box inside temperature (when an alarm occurs) n4.00 …Detailed data (26 data) to n4.26 n0.11...
Page 86 …Detailed data (28 data) to n6.28 (AKZ90A, AKZ56A-500, AKZ90A-500 when a warning occurs) Warning code 7 (last but six) n7.00 n0.10 Electric component box inside temperature (when a warning occurs) …Detailed data (28 data) to n7.28 n0.11 Compressor command revolutions (when a warning occurs) Warning code 8 (last but seven) n8.00...
Page 87: List Of Alarm Code
Overheated heater ("-H" only) When the heater overheat prevention is activated. P.88 System malfunction 10, 70 Combination of control board and inverter board is wrong. Replace the control board Malfunction due to high The condenser thermistor exceeds 62℃. pressure or condenser P.89, 90...
Page 88 P.104 device When voltage abnormality is detected. Malfunction of transmission between When the transmission is not performed normally for 10, 11 P.105 inverter CPU and a period of given time or more. temperature control CPU ①Command capacity ≧95% ② Condenser temperature - EE valve outlet Shortage of refrigerant P.106...
Page 89: Troubleshooting Flowchart
When the fan does not rotate. voltage fall within the Correct the power range of rating supply voltage. ±10%? Supposed Causes 1 F aulty connector connection 1 D isconnected wiring 1 F aulty control board (A1P) LED lamp is...
Page 90 When the main circuit for fan voltage fall within the Correct the power has an abnormal voltage. range of rating supply voltage. ±10%? Replace the inverter Supposed Causes board (A2P). 1 F aulty connector connection LED lamp is 1 D isconnected wiring...
Page 91 Troubleshooting Control panel display Overheated Heater Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A-H (All models equipped with heater) Check whether or not any valve in the oil piping system is stopped or clogged. Methods of Malfunction Detection Some valve is stopped Open the valve or rectify Superheat prevention or clogged.
Page 92 2． Detect the presence/ absence of conduction with After a lapse of 10 minutes with the compressor in stop state, disconnect the connector the high pressure switch S171 of the control board (A1P), and check the conduction of the high-pressure switch...
Page 93 Troubleshooting Control panel display Malfunction due to High Pressure or Condenser Temperature Troubleshooting Diagnosis Countermeasures ○ From the previous page The air filter Clean the air filter. gets clogged. The room Use the unit at the room temperature is 45℃ temperature of 45℃...
Page 94 (See page 130/147) Malfunction Decision Conditions Class Conditions After a lapse of 10 minutes with the compressor in stop state, disconnect the connector S172 of the control board (A1P), and When the discharge check the conduction of the compressor protection thermostat.
Page 95 Troubleshooting Control panel display Malfunction due to Discharge Pipe Temperature or Overheated Compressor Troubleshooting Diagnosis Countermeasures ○ From the previous page Are insulation and coil resistance of the compressor normal? Replace the "Check 3" compressor (M2C). (See page 117) (See page 132/148) Is the refrigerant After repairing the leak, leaking?
Page 96 Motor Operated Valve for hot gas (MOV) Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the alarm code in service monitor mode. E9.10 E9.11 E9.12 Turn OFF the power supply and then ON again. Methods of Malfunction Detection Detect the malfunction according to the opening during “Pulse detection operation with...
Page 97 Troubleshooting Control panel display Malfunction of Electronic Expansion Valve for main circuit (EEV), Motor Operated Valve for hot gas (MOV) Troubleshooting Diagnosis Countermeasures ○ From the previous page Is the coil resistance of the EEV (MOV) normal? Replace faulty EEV "Check 2"...
Page 98 AKZ**A (All series) Does the power supply voltage fall within the Correct the power range of rating supply voltage. ±10%? Methods of Malfunction Detection Pump Detect with the pump motor power supply overcurrent relay (K1S). terminal is properly Connect the pump...
Page 99 Troubleshooting Control panel display Actuation of boil-dry Prevention Switch or Optional Safety devices Applicable Models Troubleshooting ①AKZ**A-H Diagnosis Countermeasures ②Models other than AKZ**A-H with optional safety device mounted Is it a heater Check the optional safety equipped model? devices for the function and then rectify if required.
Page 100 Rectify the part Class Conditions piping system. (e.g., open the valve). The inlet oil temperature exceeds 65℃ for a period of consecutive 10 seconds. Is the outside Supposed Causes pressure loss 0.5 MPa Reduce the pressure or less? loss. (Contact the customer.)
Page 101 Troubleshooting Control panel display Rise in Oil Inlet Temperature Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Are the inlet oil thermistor characteristics normal? Replace the inlet oil "Check 1" thermistor (Th-4). (See page 116) (See page 130/146) Methods of Malfunction Detection unit operates Detect with the inlet oil Operate the unit while in...
Page 102 ●Troubleshooting Control panel display Malfunction of Thermistors H0,H1,J3,J4 J6,JH,JJ Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the connector for connection. Methods of Malfunction Detection Is the Detect malfunction according connection Properly connect the normal? to resistance detected with connector.
Page 103 Troubleshooting Control panel display Rise in IPM Temperature or Radiation Fin Temperature Applicable Models Troubleshooting Diagnosis Countermeasures AKZ90A AKZ14A–90A-500 While in service monitor mode (refer to page 82), check to be sure the IPM temperature when an alarm occurs. Methods of Malfunction Detection Has the IPM temperature or Detect with the IPM...
Page 104 ●Troubleshooting Control panel display Instantaneous Overcurrent of Power Device or IPM Temperature Abnormality (AKZ14A–56A only) Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the model name. Check the alarm code in service monitor mode. L5.72 and In all other AKZ14A–56A cases (200 V models)
Page 105 Troubleshooting Control panel display Compressor Overloaded Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the alarm code in service monitor mode. L8.70 L8.71 Is each resistance of the compressor normal? Replace the Methods of Malfunction Detection "Check 3" compressor (M2C). (See page 117) (See page 132/148) Detect according to the output...
Page 106 ●Troubleshooting Control panel display Faulty Compressor Startup Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the alarm code in service monitor mode. L9.70 L9.71 L9.72 Disconnected Methods of Malfunction Detection or erroneous wire connections Correct the compressor of the compressor are (M2C) wiring.
Page 107 Troubleshooting Control panel display Instantaneous Overcurrent of Power Device Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the alarm code in service monitor mode. LA.70 LA.71 Is each resistance of the compressor normal? Methods of Malfunction Detection Replace the "Check 3"...
Page 108 Class Conditions When the transmission The power is not performed Take measures against supply line contains 10, 11 normally for a period of the noises. noises. given time or more. (Retry: 20 times) Check to be sure noises that are not normally...
Page 109 Troubleshooting Control panel display Shortage of Refrigerant Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Is the refrigerant Adjust the refrigerant amount normal? amount properly, and find the cause of refrigerant Methods of Malfunction Detection leakage (e.g. broken piping), and correct it. Detect the condenser Remove the condenser thermistor (Th-7) and EE temperature (Th-7) and the...
Page 110 Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the alarm code in service monitor mode. U1.10, U1.11 U1.14, U1.15 U1.12, U1.13 Methods of Malfunction Detection Turn OFF the power Detect each phase in power supply and then ON again.
Page 111 Troubleshooting Control panel display Low voltage (Inverter Main Circuit DC voltage) Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) The power The surge current is turned ON/OFF frequently. limitation circuit preventive function is actuated. Turn Methods of Malfunction Detection off the power supply, and after a lapse of two minutes or longer, turn on Detect according to voltages of...
Page 112 ●Troubleshooting Control panel display Malfunction of Transmission with Slave Unit Applicable Models Troubleshooting Diagnosis Countermeasures Master unit side of model using the communication board (optional) Check the communication line with the slave unit for connections. Methods of Malfunction Detection Check with the microcomputer Normal? Correct the connections.
Page 113 Troubleshooting Control panel display Actuation of External Safety Device Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A connected to the external safety device Disconnect the connector CN2 from the control board, and then check for occurrence of malfunction code “ UJ ” . (If the code “...
Page 114: List Of Warning Codes
●Troubleshooting 3-4. List of warning codes Warning Warning Details Operating conditions Remarks Reference code level ①Clog of suction filter Warning history record － ② Increased pressure loss of oil circuit Low oil level P.112 only ③Use of viscous oil Rise in power supply Fan power supply voltage Warning history record Keep the power supply voltage...
Page 115: Troubleshooting Flowchart
Troubleshooting 3-5. Troubleshooting Flowchart Control panel display Low Oil Flow History record only Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Is the tank Refill the tank with the filled with the correct amount of oil? correct amount of oil. Methods of Malfunction Detection Detect decrease in pump flow viscosity is more than...
Page 116 (See page 116) (See page 128/143/150) pulse (corrected to 12 pulses maximally). ・ AKZ14A, 56A, 90A: -15℃ or lower AKZ32A, 43A: -10℃ or lower No latch noise comes from Replace the EEV (Y1E) EEV or MOV. or MOV (Y2E) without latch noise.
Page 117 Troubleshooting Control panel display Malfunction of Thermistors H1,J3,J4, J6,JH,JJ,P3,P4 Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Check the connection of connector. Methods of Malfunction Detection Detect by the resistance Normal Connect properly. (*1) detected by the thermistor. Remove the thermistor from the control board, and measure the Malfunction Decision Conditions resistance with a tester.
Page 118: High-Pressure
●Troubleshooting Control panel display High-pressure Applicable Models Troubleshooting Diagnosis Countermeasures AKZ**A (All series) Any obstacle Remove all the obstacles. near the intake or exhaust sections Keep any subject getting in the way of air ventilation from the area within 500 mm from the Methods of Malfunction Detection intake and exhaust port.
Page 119: Check
The relationship between temperature and resistance during normal operation is as shown in the graph and table below. Characteristics of thermistor 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 Temperature (℃) Temperature (℃) Resistance value (kΩ) 67.33 40.38 31.69 25.08 20.00 16.07...
Page 120 ●Troubleshooting Check 3 Check the compressor resistance ①Turn off the power supply, and then disconnect wires (U, V, W) from the compressor. ②Measure insulation resistance between each of the terminals and the casing of the compressor. ③Measure resistance between terminals of the compressor. *Normal compressor coil resistance (±5％...
Page 121: Disassembling Procedure
④ Unscrew the two screws that hold ② Adjust the screw the top panel, and remove it. tightening torque to 1N-m ±10% during mounting. Use the screws dedicated 2. Removing back panel, side for the switch box cover. panel, and related parts (DO NOT use the tapped ①...
Page 122 ●Disassembling Procedure Procedure for Removing Wiring WARNING Before disassembling work, be sure Inside Wiring Port to turn OFF all power supplies. Work Procedure Point 1 Many of the DC fan motor Wiring port cover (M3F), electronic expansion valve for main circuit (Y1E), motor operated valve for hot gas (Y2E), high pressure switch (S3PH), and connection...
Page 123 Disassembling Procedure Procedure for Removing Propeller WARNING Before disassembling work, be sure Fan, DC Fan Motor to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, back panel, left side panel, and right side panel in accordance with “Procedure for Removing Outside Panel Block (P.118)”.
Page 124 ●Disassembling Procedure Procedure for Removing Switch WARNING Before disassembling work, be sure to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, CN10 back panel, left side panel, and right side When replacing the switch box, change the setting panel in accordance with “Procedure for data referring to “Replacing...
Page 125 7) Signal terminal block (X2M)*3 8) Inverter board power supply wire (S200) 9) Inverter board signal wire 1 (S170) 10) Inverter board signal wire 2 (S140) 11) Inverter board signal wire 3 (S60) 12) Over current relay signal wire (S182)
Page 126 ●Disassembling Procedure Procedure for Removing Noise WARNING Before disassembling work, be sure Filter Board (AKZ14A–43A-500) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover in Intermediate panel assembly accordance with “Procedure for Removing Outside Panel Block (P.118)”.
Page 127 Disassembling Procedure Procedure for Removing Inverter WARNING Before disassembling work, be sure Board (AKZ14A–43A) (1/2) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover in accordance with “Procedure for Removing Outside Panel Block (P.118)” . 1 Remove the control panel mounting plate in accordance with...
Page 128 ●Disassembling Procedure Procedure for Removing Inverter WARNING Before disassembling work, be sure Board (AKZ14A–43A) (2/2) to turn OFF all power supplies. Work Procedure Point ③ Remove the ring core fixed Attach so that the inverter output harness connector projects inward When installing the inverter to the electrical fixing plate board assembly, a cable tie...
Page 129 Disassembling Procedure Procedure for Removing Inverter WARNING Before disassembling work, be sure Board (AKZ14A–43A-500) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover in accordance with “Procedure for Removing Outside Panel Block (P.118)”. 1 Remove the control panel mounting plate in accordance with “Procedure for Removing Switch Box (P.121)”.
Page 130 ●Disassembling Procedure Procedure for Removing Oil WARNING Before disassembling work, be sure Pump to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top Fixing screw Fixing After the oil pump (M1P) is panel, back panel, left side panel, plate replaced, the cumulative oil and right side panel in accordance...
Page 131 Disassembling Procedure Procedure for Removing EEV (for WARNING Before disassembling work, be sure main circuit) and MOV (for hot gas) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, Electronic expansion After the motor operated valve coil (Y1E: for back panel, left side panel, and right side main circuit)
Page 132 ●Disassembling Procedure Procedure for Removing High WARNING Before disassembling work, be sure Pressure Switch to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box Once the sealing material cover, top panel, back of the wiring port is panel, left side panel, High pressure switch removed, its dust-preventive...
Page 133 Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Thermistors (1/2) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top EEV outlet thermistor (Th-8) Disconnect the relay panel, back panel, left side panel, connector in the oil cooling and right side panel in accordance Support...
Page 134 ●Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Thermistors (2/2) to turn OFF all power supplies. Work Procedure Point Removing condenser Disconnect the relay thermistor (Th-7) connector in the oil cooling ① Disconnect the relay unit before replacing the Support thermistors.
Page 135 Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Compressor *1, 2, 3 to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, When replacing the top panel, back panel, left side compressor (M2C), prepare Compressor panel, and right side panel in Compressor protection...
Page 136: Akz56A, 90A
④ Unscrew the three screws that ② Adjust the screw hold the top panel, and remove it. tightening torque to 1N-m ±10% during mounting. 2. Removing back panel, side Use the screws dedicated for the switch box cover. panel, and related parts (DO NOT use the tapped ①...
Page 137 Disassembling Procedure Procedure for Removing Wiring WARNING Before disassembling work, be sure Inside Wiring Port to turn OFF all power supplies. Work Procedure Point 1 Many of the DC fan motor (M3F), Wiring port cover electronic expansion valve for main circuit (Y1E), motor operated valve for hot gas (Y2E), high pressure switch (S3PH), and connection wiring (lead...
Page 138 ●Disassembling Procedure Procedure for Removing Propeller WARNING Before disassembling work, be sure Fan, DC Fan Motor to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, back panel, Wind control panel left side panel, and right side (AKZ90A-500 only) panel in accordance with “Procedure for removing...
Page 139 Disassembling Procedure Procedure for Removing Switch WARNING Before disassembling work, be sure to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, CN10 back panel, left side panel, and right side When replacing the switch box, change the setting panel in accordance with “Procedure for data referring to “Replacing...
Page 140 7) Signal terminal block (X2M)*3 8) Inverter board power supply wire (S200) 9) Inverter board signal wire 1 (S170) 10) Inverter board signal wire 2 (S140) 11) Inverter board signal wire 3 (S60) 12) Over current relay signal wire (S182)
Page 141 Disassembling Procedure Procedure for Removing Noise WARNING Before disassembling work, be sure Filter Board to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover in AKZ90A-500, AKZ56A-500: accordance with “Procedure for see page 123. Removing Outside Panel Block (P.133)”.
Page 142 ●Disassembling Procedure Procedure for Removing Inverter WARNING Before disassembling work, be sure Board (AKZ56A, 90A) (1/2) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover in accordance with “Procedure for Removing Outside Panel Block (P.133)”...
Page 143 Disassembling Procedure Procedure for Removing Inverter WARNING Before disassembling work, be sure Board (AKZ56A, 90A) (2/2) to turn OFF all power supplies. Work Procedure Point ③ Remove the ring core fixed Attach so that the inverter output harness connector projects inward When installing the inverter to the electrical fixing plate Banding band...
Page 144 ●Disassembling Procedure Procedure for Removing Inverter WARNING Before disassembling work, be sure Board (AKZ56A, 90A-500) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover in accordance with “Procedure for Removing Outside Panel Block (P.133)”. 1 Remove the control panel mounting plate in accordance with “Procedure for Removing Switch Box (P.136)”.
Page 145 Disassembling Procedure Procedure for Removing Oil WARNING Before disassembling work, be sure Pump to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top Oil pump (M1P) After the oil pump (M1P) is panel, back panel, left side panel, Hose band (two places) replaced, the cumulative oil...
Page 146 ●Disassembling Procedure Procedure for Removing EEV (for WARNING Before disassembling work, be sure main circuit) and MOV (for hot gas) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, After the motor operated Electronic expansion back panel, left side panel, and right side valve coil...
Page 147 Disassembling Procedure Procedure for Removing High WARNING Before disassembling work, be sure Pressure Switch to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top High pressure switch (S3PH) Once the sealing material panel, back panel, left side panel, of the wiring port is and right side panel in accordance Heat insulating...
Page 148 ●Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Evaporator to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, back Outlet oil panel, left side panel, thermistor (Th-2) and right side panel in accordance with “Procedure for Removing Heat...
Page 149 Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Thermistors (1/2) to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box cover, top panel, back panel, left side panel, Relay connector and right side panel Outlet oil in accordance with thermistor...
Page 150 ●Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Thermistors (2/2) to turn OFF all power supplies. Work Procedure Point Dew proofing 3. Removing discharge thermistor (Th-6) material Disconnect the relay ① Disconnect the relay connector in the oil cooling Support spring unit before replacing the...
Page 151 Disassembling Procedure Procedure for Removing WARNING Before disassembling work, be sure Compressor *1, 2, 3 to turn OFF all power supplies. Work Procedure Point 1 Remove the switch box When replacing the cover, top panel, back panel, compressor (M2C), prepare Compressor protection left side panel, and right side Compressor...
Page 152: Replacement Procedure
Replacement Procedure ●Replacement Procedure １ Replacing Control Board For the replacement of the control board, check to be sure the model name of Oil Cooling Unit corresponds to the applicable model of the board*, and then, follow the procedure shown below. * Models AKZ14A, 32A and 43A, and models AKZ14A-500, 32A-500 and 43A-500 use the same inverter board, so even if a non-applicable board is used, the compressor will still operate.
Page 153: Procedure For Replacing Eev (For Main Circuit) And Mov (For Hot Gas)
Replacement Procedure ２ Procedure for Replacing EEV (for main circuit) and MOV (for hot gas) In order to replace the electronic expansion valve for main circuit (EEV) or motor operated valve for hot gas (MOV) main unit, be sure to perform the fully closed pulse detection operation. (The reason is that the pulse to fully close the EEV and MOV varies.) Replace the EEV and MOV main units in accordance with the following procedures.
Page 154: Miscellaneous Reference Data
Miscellaneous Reference Data ●Miscellaneous Reference Data １ Characteristics of Refrigerant R410A Pressure MPa...
Page 155 Miscellaneous Reference Data Pressure MPaG Temperature ℃ Pressure MPaG Temperature ℃ Pressure MPaG Temperature ℃...
Page 156: Procedure For Mounting Optional Parts
●Miscellaneous Reference Data ２ Procedure for Mounting Optional Parts 2-1. Machine Body Thermistor/Returned Oil Thermistor (Optional) ①Symbol and intended use by type Mounting this optional part to the oil piping of the main machine makes it possible to detect and control the temperature. Lead wire Intended use Name...
Page 157: Communication Board (Optional)
Optional parts Communication method Type Mounting position Compatible model Speciﬁcation No. Serial communication AKZA–OP–CS Inside switch box AKZ**A (10 series) PSP07465 Serial / Parallel communication AKZA-OP-CSP Inside switch box AKZ**A (10 series) PSP07466 Mounting procedure AKZA-OP-CS Provided lead wire Connect to CN12 of the control board of OILCON with the provided lead wire.
Page 158: Notes On Installation
• During adjustment at trial run, the strainer gathers much dust from the oil piping system. Clean or replace the strainer before starting actual operation. Check the strainer periodically. • The oil pollution level must not exceed NAS class 10. 3-3. Oil Tank •...
Page 159: Electric Wiring Work
Miscellaneous Reference Data ４ Electric Wiring Work  Conduct electric wiring according to the local wiring standard.  For the power supply, be sure to use the commercial power source. If you use the inverter power source or other power source, the product may cause burnout.
Page 160: Mounting A Ground Leakage Circuit Breaker
The Oil Cooling Unit is not equipped with a ground leakage circuit breaker. Be sure to mount a 3-pole ground leakage circuit breaker (∗) exclusively for the Oil Cooling Unit to the main machine. For the breaker capacity, refer to the speciﬁcations of each model (from page 10). (Recommended product: Rated sensitivity current 15 mA or 20 mA) ∗...
Page 161: Switch Box Outline
Power terminal block Our internal wiring Earth 9 10 11 12 13 30 31 60 61 62 63 64 65 66 67 -048: 440V 460 480 440 460 480 440 460 480 Select a terminal according to the main power supply voltage.
Page 162: Input
[10]-[11]. (For the crimp tool, use the speciﬁed tool.) ∗12 VDC is applied across these terminals (Terminal [10]: negative polarity, [11]: positive polarity). 4-6. Connecting External Output Contact To output the Oil Cooling Unit operation status signal to the main machine, connect the required signal cable to the signal terminal block according to the procedure below.
Page 163 Alarm Alarm (including power failure) level 2 level 1 Power supply Reset Reset Remote control Between terminals contact [10]-[11] Operation Operation panel lock mode Between terminals Normal (“a” contact) [60]-[61] Alarm/Stop (Power Between terminals OFF) (“b” contact) [60]-[63] Agitator operation/ Between terminals Pump run (“a”...
Page 164: Maintenance And Inspection
●Miscellaneous Reference Data ５ Maintenance and Inspection 5-1. Daily Maintenance and Inspection ・ Oil pollution causes a fault or shortened service life of the pump. The oil pollution level must not exceed NAS class ・ Keep a normal oil level in the oil tank (Between the yellow line and red line of the oil level gauge). Make sure that the oil does not contain air bubbles.
Page 165: To Leave The Unit Unused For A Long Period
Miscellaneous Reference Data 5-3. To leave the unit unused for a long period ・Mount a cover to the Oil Cooling Unit to prevent dust or water from entering inside of the unit. ・Be sure to turn OFF the main power supply. ・Be careful to keep oily dust off the condenser surface of the Oil Cooling Unit.
Page 166 MEMO...
Page 167 MEMO...
Page 169 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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