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Daikin AKZ8 Series - User Manual

Daikin AKZ8 Series
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Built-in breaker
model
Built-in tank
model
Different-voltage
model
CE model
Built-in heater
model
Installation
Models
Oil Cooling Unit and Accessories
4
Precautions for Installation 5
Reference for Pipe Selection 6
Electric Wiring 7
CONTENTS
1
Circulating type
Standard
model
Menu
Series
Built-in
breaker
model (–B)
CE model
(–C)
Built-in
heater
model (–H)
Built-in
tank model
(–T1, –T)
Different-
voltage
model (–E)
AKZ148
AKZ328
AKZ438
AKZ568
AKZ908
Instruction Manual
AKZ8 Series
If the air filter is clogged, the cooling performance deteriorates,
causing excess power consumption.
Clean the air filter periodically to reduce power consumption.
Thank you for purchasing DAIKIN Oil Cooling Unit (“OILCON”).
This instruction manual includes instructions for using the Oil
Cooling Unit.
To ensure proper use of this product, be sure to read through this
instruction manual before using it.
After reading this manual, keep it handy for your future reference.
Monitor Items 23
Timer Operation 24
Additional Setting Functions 25
Setting Additional Function 27
For Temperature Control Improvement 30
Alarm/Warning Output Logic 33
Alarm Settings for Optional Protection
Devices (Installed by User) 33
Handling
Before Operation
12Model Identification and Specifications
14
Part Names and Functions 15
Names and Functions of the Control Panel Parts
16
Checking Initial Operating Conditions 18
Operation Setting 19
Holding Constant Oil Temperature 20
Tuning Oil Temperature to Room Temperature
(or Machine Temperature)
21
Cooling Oil at Constant Capacity (%) 22
Optional Parts
Machine temperature tuning control 34
Returned oil temperature control 35
Communication with main machine 36
Maintenance
37
38
Maintenance/Inspection
• Daily maintenance/inspection
• Periodic maintenance/inspection
• To leave the unit unused for a long period
Troubleshooting
• When the unit operation seems abnormal
although no alarm is activated
• When an alarm is activated
Safety Precautions
Installation
Procedure
Before
Operation
Useful
Functions
Maintenance
Troubleshooting
Optional
Functions
Operating
Procedure
DAIKIN Oil Cooling Unit
(“OILCON”)
Proper use results in power saving
PIM00116C
PIM00116C_EN.fm -1 ページ ２００８年９月２９日　月曜日　午前１１時５１分

Table of Contents

Questions and Answers

  • M
    Margaret ArmstrongAug 3, 2025
    What to do if my Daikin AKZ8 unit won't cool oil, even though the pump and compressor are running?
    • L
      Laura HermanAug 3, 2025
      If your Daikin Accessories unit isn't cooling oil despite the pump and compressor running, several factors could be the cause. First, check for any obstructions near the air intake/exhaust port and remove them. Next, inspect the air filter for clogs and clean it if necessary. Also, the unit might be under capacity suppressing control due to high room temperature; compare the capacity in the operating temperature range with the catalog to see if you need a model with more appropriate capacity. Ensure that the temperature setting isn't too high by adjusting it to a more appropriate level. Finally, if the exhaust air temperature is nearly the same as the room temperature when the compressor is running, the refrigerant gas might be low, and you should refill it.
  • W
    woodcurtisAug 7, 2025
    What to do if my Daikin AKZ8 compressor does not run, although the pump is running?
    • D
      Daniel FreemanAug 7, 2025
      If the compressor in your Daikin Accessories unit isn't running while the pump is, it could be due to several reasons. The compressor might be stopped under temperature control. Check if the compressor restart prevention timer has been activated and wait for the preset time to elapse. Also, the low oil temperature or low ambient temperature protection device might be activated; ensure the oil temperature is at least 5°C and the room temperature is at least 0°C. Another possibility is that the capacity setting is at 0% (Mode 9); if so, change the operation mode to an appropriate setting.
  • A
    Anthony ClarkAug 11, 2025
    What to do if oil does not flow in my Daikin AKZ8, although the pump is running?
    • N
      nancy53Aug 11, 2025
      If oil isn't flowing in your Daikin Accessories unit even when the pump is running, and the pump sound level is high, there are a few things to check. First, inspect the pump suction pipe connection for looseness; check the pipe packing and re-tighten it securely. Then, examine the suction strainer for clogs and clean it; if the oil in the tank is dirty, replace it. Also, check the oil level in the tank and refill if necessary. If there's a large pressure loss in the oil discharge pipe, causing the pump relief valve to activate, increase the oil pipe diameter and shorten the pipe length.
  • C
    Cameron PerryAug 15, 2025
    How to fix Daikin AKZ8 when operation setting cannot be performed?
    • B
      bensonjohnAug 15, 2025
      If you cannot perform operation settings on your Daikin Accessories unit, there are a couple of things to check. If “---” appears on the data display, the temperature sensor corresponding to the selected operation mode might not be connected; ensure the corresponding temperature sensor is connected. If “---” momentarily appears when you press the [ENT] key, the erroneous operation prevention switch might be set to ON; turn OFF the erroneous operation prevention switch (SW1) on the control board.
  • J
    Johnny NelsonAug 20, 2025
    Why Daikin AKZ8 alarm output operation is different from conventional signal output?
    • A
      Amanda YorkAug 20, 2025
      The alarm output operation in your Daikin Accessories unit might differ from conventional signal outputs because the alarm output signal connection has been partially changed. The [60] to [63] outputs are compatible with conventional models (AKS5 and AKZ6 series). However, with the AKZ8 series, signal operations and connections of the [64] and [65] outputs have been changed.
  • S
    susan87Aug 25, 2025
    What to do if my Daikin AKZ8 pump does not run?
    • A
      aguilarderekAug 26, 2025
      If the pump in your Daikin Accessories unit isn't running, check the connection of the remote control input. Also, the unit might be set to the operation lock mode; cancel the LOCK mode on the control panel.
  • T
    toddblackwellAug 29, 2025
    What to do if my Daikin AKZ8 unit does not run at all?
    • E
      ewhiteAug 29, 2025
      If your Daikin Accessories unit isn't running at all and the POWER lamp on the control panel is unlit, check if the main power supply is OFF or if the power cable (L1, L2) is disconnected. Ensure the power cable is connected to the power supply terminal.

Summary

Safety Precautions

Installation Safety

Guidelines and warnings for safe installation of the unit, covering qualified personnel and electrical connections.

Usage Safety

Precautions and warnings for safe operation and handling of the unit, including electrical safety and environmental considerations.

Installation Procedure

Oil Cooling Unit and Accessories

Check the Oil Cooling Unit and its included accessories upon receipt.

Installation Place and Oil Piping

Select suitable installation location and manage oil piping for the unit.

Suction Strainer (Line Filter)

Details on installing and maintaining the suction strainer to prevent clogging and ensure flow.

Reference for Pipe Selection

Guidelines for selecting appropriate pipe diameters and lengths based on model and conditions.

Electric Wiring

Instructions for conducting electrical wiring according to local standards and safety regulations.

Starting;Stopping the Oil Cooling Unit

Describes three methods to start and stop the unit: main power, remote control, and control panel.

Mounting a Circuit Breaker

Guidance on mounting an exclusive circuit breaker for the unit, including earth leakage breaker recommendations.

Wiring Procedure

Step-by-step instructions for wiring the unit, including cable size and connection points.

Outline of Electrical Equipment Box

Diagram and explanation of the electrical equipment box layout and terminal blocks.

Connection of Remote Control Input

Procedure for connecting remote control signals for unit operation and setting.

Connection of External Output Contact

How to connect signal cables for outputting operation status and alarm signals.

Electric Wiring Diagram

Detailed wiring diagram illustrating component connections for typical models.

Handling

Model Identification and Specifications (AKZ148;328;438)

Details on identifying models and their technical specifications, including cooling capacity and power requirements.

Model Identification and Specifications (AKZ568;908)

Details on identifying models and their technical specifications, including cooling capacity and power requirements.

Part Names and Functions

Identifies major components and their roles across different unit models.

Before Operation

Operating Environment

Guidelines for the operational environment, including atmosphere, temperature, and humidity.

Installation Checks

Pre-operation checks related to secure installation and ensuring unobstructed air intake/exhaust.

Oil Piping Checks

Checks for oil piping leaks, blockages, and ensuring the correct oil level in the tank.

Applicable Oil

Lists suitable lubrication and hydraulic oils, and specifies oils that cannot be used with the unit.

Control Panel Parts and Functions

Details the buttons, lamps, and displays on the control panel for monitoring and operation.

Checking Initial Operating Conditions

Steps to check and cancel operation lock mode before initial use and confirm operating conditions.

Operation

Operation Modes

Lists and describes the seven available operation modes for the unit.

Operation Settings

Overview of modes for controlling oil temperature and capacity based on system requirements.

Operating Procedure

Holding Constant Oil Temperature

Procedure to set inlet or outlet oil temperature to a constant value.

Tuning Oil Temperature to Room or Machine Temperature

How to set oil temperature based on room or machine temperature using temperature difference.

Cooling Oil at Constant Capacity (%)

Procedure to set cooling operation based on a specified capacity percentage.

Useful Functions

Monitor Items

Lists items that can be monitored in 'Monitor mode', such as temperatures and capacity.

Timer Operation

How to set the ON timer for delayed start-up, useful for machine warm-up.

Additional Setting Functions

Overview of optional functions like auto-tuning, temperature warnings, and communication.

Parameter Setting Procedure

Steps to set parameters for various additional functions using the control panel.

Setting Additional Function-Temperature Range Warning

Details on setting temperature range warnings, conditions, and output logic.

Description on Parameter Settings (Group A)

Explanation of Group A parameters for temperature range warning condition and operation settings.

Description on Parameter Settings (Group B)

Explanation of Group B parameters for temperature range warning temperature and reset settings.

For Temperature Control Improvement-Auto-tuning Mode

Guide to using auto-tuning for better temperature control performance by adjusting gain settings.

Operation Flow

Visual representation of the auto-tuning operation steps and status indicators.

Auto-tuning Notes and Parameters

Important notes and parameter explanations for the auto-tuning process.

Optional Parts

Returned Oil Temperature Control

How to install and use the returned oil temperature control thermistor.

Machine Temperature Tuning Control

Instructions for installing thermistors to monitor machine temperature for control.

Communication with Main Machine

Details on mounting optional boards for unit communication with the main machine.

Maintenance

Daily Maintenance;Inspection

Routine checks for the unit's daily operation and health, focusing on oil and power supply.

Periodic Maintenance;Inspection

Scheduled maintenance tasks like cleaning strainers, air filters, and condensers.

Condenser Cleaning and Exterior Care

Instructions for cleaning the condenser fins and maintaining the unit's exterior.

To Leave the Unit Unused for a Long Period

Procedures for storing the unit when not in use, including protection and power off.

Troubleshooting

When the Unit Operation Seems Abnormal

Troubleshooting steps when the unit operates abnormally without an alarm.

Alarm List

Lists various alarm codes, their causes, and corrective actions for unit malfunctions.

Alarm List (Continued)

Continues the list of alarm codes, their causes, and corrective actions.

Daikin AKZ8 Series Specifications

General IconGeneral
CategoryAccessories
SeriesAKZ8
Compatible SystemsDaikin VRV, VRF, and SkyAir systems
Display TypeLCD
Control FunctionsTemperature, Fan Speed

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