Advanced Temperature Controller AKO-16526A / AKO-16526AN User Manual

Quick Start Guide

The AKO-16526A / 16526AN controller features a SELFDRIVE operating mode that automatically manages fans and defrost cycles to optimize cold room performance. Upon first power-up, the unit enters the ASSISTANT mode. Use the arrow keys to change values and the SET button to accept and proceed to the next step.

Device Description

The controller is designed for cold room stores and includes an output for electronic expansion valve regulation. The AKO-16526AN model includes an NBIoT communication module for autonomous data transmission to akonet.cloud.

Keypad Operation

• Stand-By: Press for 3 seconds to activate/deactivate.
• Defrost: Press for 3 seconds to start/stop.
• Light: Short press to toggle cold room light.
• Programming: Press SET for 3 seconds for condensed menu, 6 seconds for extended menu.
• Set Point: Short press to view current set point; press for 3 seconds to adjust.

Installation of Probes

Correct probe installation is critical for thermal transfer calculation and defrost management.

• Ambient Probe: Place in an area not directly receiving cold air from the evaporator, preferably in the air aspiration zone.
• Evaporator Probe: Place as close as possible to the refrigerant inlet (near the expansion valve) in the finned area. If using electric defrost, place away from heating elements.
• Fixing: Use the provided clips for 10-25 mm pipes. Ensure direct contact with the tube and bend probe fins to increase contact surface.

Setup Wizard

The assistant guides you through initial configuration:

1. Step 1: Select the installation type (InI option) from the provided table (e.g., compressor control, pump down, defrost type).
2. Step 2: Define the refrigerant gas type (u02).
3. Step 3-4: Define pressure sensor range (I62/I63) if applicable.
4. Step 5: Set temperature set point.
5. Step 6: Choose whether to set remaining parameters to default.

Operation and Messages

The display shows various status icons and error codes. Common messages include:

• Pd / LP: Pump down malfunction (Stop/Start).
• E1-E6: Sensor fault (open or crossed circuit).
• Ad0: Open door alarm.
• HCP: HACCP alarm.
• dEF: Defrost in progress.

Technical Specifications

The controller operates on 100-240 V ~ 50/60 Hz. It features multiple relay outputs (DEF, FAN, COOL, AUX1-3) with varying current ratings. The unit is IP65 rated when the cover is closed and properly installed with glands. Operating temperature range is -10 ºC to 50 ºC.