Check Common Issues Step by Step

Check in this order

1. 1.Confirm that the phone is connected to a 2.4GHz Wi-Fi network.
2. 2.Enter the network name and password carefully, distinguishing 0 from O and 1 from lowercase l.
3. 3.Touch the product power button for five seconds and confirm that the white LED is blinking.
4. 4.Connect to the product network beginning with ElecQUA_, keep the connection if an internet warning appears, and return to the app.
5. 5.If the router name or password changed, remove the old product entry, reset the product and register it again.

Never send the actual Wi-Fi password to support. WPA3, mixed security modes and allowed characters require version-specific confirmation.

Related manuals

• —Product Registration Guide · PDF pages 1 and 5–12 (Korean)
• —Area, Room and Product Management Guide · PDF page 2 (Korean)

Prepare this information if the issue remains

• —Phone model, operating system and app version
• —The step where registration stops and a screenshot
• —Router model, security mode and whether the white LED blinks

Check in this order

1. 1.Confirm the aquarium dimensions and whether a rear or bottom sump is included.
2. 2.Check the actual peak room temperature, target temperature and current water temperature.
3. 3.Confirm that the heat exchanger is fully submerged and the upper and lower vents are open.
4. 4.Place the sensor away from the heat exchanger where the water is mixed evenly.
5. 5.Review lighting, filter and pump heat, lower-tank circulation and heat-sink cleaning.

Aquarium volume alone cannot guarantee a target temperature or cooling time. A temporarily unchanged display does not establish a product fault.

Related manuals

• —Product Manual · PDF page 3 / printed page 3: installation and ventilation (Korean)
• —Product Manual · PDF page 4 / printed page 5: performance table (Korean)
• —App Guide · PDF pages 9–10: target, sensitivity and performance mode (Korean)

Prepare this information if the issue remains

• —Aquarium size, peak room temperature, target/current temperature and mode
• —Photos of the sensor, product position, upper/lower vents and entire aquarium
• —Installed equipment and last cleaning date

Check in this order

1. 1.Disconnect product power, then remove the water-temperature sensor.
2. 2.Wipe the metal terminal with a dry cloth and fully dry any moisture around the connector using cool air.
3. 3.Reconnect the sensor completely before reconnecting product power.
4. 4.Submerge the sensor where water is mixed evenly and away from the heat exchanger.
5. 5.Check filter blockage and lower-tank circulation, then compare with the spare sensor if the symptom remains.

Do not conclude that the sensor is defective before these checks. Compare thermometers only after both readings stabilize in the same location.

Related manuals

• —Product Manual · PDF page 2 / printed pages 1–2: sensor and connection (Korean)
• —Product Manual · PDF page 3 / printed page 3: placement and moisture warning (Korean)
• —App Guide · PDF page 13: sensor correction (Korean)

Prepare this information if the issue remains

• —Displayed temperature range, timing and separately measured temperature
• —Photos of the sensor terminal, connector, sensor position and aquarium
• —Results after drying, reconnecting and comparing the spare sensor

Check in this order

1. 1.Confirm that the product LED is on and check its actual operation.
2. 2.Do not reset the product or delete it from the app.
3. 3.Disconnect and reconnect power to the wireless router.
4. 4.Swipe down on the product details screen to request the latest status.
5. 5.Check whether the app remains offline after the router reconnects.

DEVICE OFFLINE in the app alone does not mean that the product itself has stopped. No fixed delay is stated for power-outage notifications.

Related manuals

• —Product Registration Guide · PDF pages 14–15: saved settings and status refresh (Korean)
• —App Guide · PDF page 6: request latest status (Korean)

Prepare this information if the issue remains

• —Outage and restoration time, and the LED state after power returned
• —App message and router status
• —Whether a five-second reset or app deletion was performed

Check in this order

1. 1.Check whether a large water drop reached the power button.
2. 2.Check whether wiring near the touch sensor changed after moving the aquarium or lighting.
3. 3.Enable Touch Lock in the app.
4. 4.Check Touch Lock again after a power outage or adapter reconnection.
5. 5.Record how often the symptom repeats and the LED/app state at that time.

Do not conclude that the product or a specific cable is the cause before inspection. If the symptom repeats with Touch Lock enabled, installation photos are needed.

Related manuals

• —App Guide · PDF page 14: Touch Lock (Korean)
• —Product Registration Guide · PDF page 17: Touch Lock (Korean)

Prepare this information if the issue remains

• —Recent aquarium, lighting or wiring changes
• —Key-lock state and number of repetitions
• —Photos of wiring near the touch sensor, lighting cable, adapter and installation

Check in this order

1. 1.Confirm that the product LED is on and check the actual operation.
2. 2.Open the product details screen in the app.
3. 3.Swipe down to request the latest status.
4. 4.Check whether the water temperature is within the target and sensitivity range with no mode change.
5. 5.Confirm whether 0.0°C remains after refreshing.

Do not diagnose a sensor fault or reboot from the 0.0°C display alone. Existing documents give different update times, so this page does not promise a fixed waiting time.

Related manuals

• —Product Registration Guide · PDF page 15: latest-status request (Korean)
• —App Guide · PDF page 6: latest-status request (Korean)

Prepare this information if the issue remains

• —When 0.0°C first appeared and how long it remained
• —App screen, target temperature and sensitivity settings
• —Product LED and actual cooling or heating state

Check in this order

1. 1.Record which colours repeat: blue, red, turquoise, blinking purple, blinking orange or blinking white.
2. 2.Confirm that the supplied original power adapter is connected.
3. 3.Check that the upper and lower vents are open and well ventilated.
4. 4.Check the heat sink for dust, debris or grease.
5. 5.Record a short video of the repeated sequence and disconnect power.

Do not assign the cause to the adapter, ventilation or contamination before inspection. Check the manual's fault guidance for blinking purple or orange.

Related manuals

• —Product Manual · PDF page 4 / printed page 5: modes and LED colours (Korean)
• —Product Manual · PDF page 5 / printed page 7: installation and electrical safety (Korean)

Prepare this information if the issue remains

• —A video showing the repeated LED colours and sequence
• —Photos of the installation, upper/lower vents and entire aquarium
• —Photos of the adapter and label, and the heat-sink condition

Check in this order

1. 1.Confirm that the heat exchanger is fully submerged before the water change.
2. 2.Turn the product off first if the water level may expose the heat exchanger.
3. 3.Keep the product off until the water change is complete.
4. 4.Refill the aquarium and confirm that the heat exchanger is fully submerged.
5. 5.Check the product and sensor connections before turning power back on.

Do not rely on an assumed safe exposure time or automatic shutoff. If the product operated while fully exposed, check its condition and contact support.

Related manuals

• —Product Manual · PDF page 3 / printed page 3: fully submerged installation (Korean)
• —Product Manual · PDF page 5 / printed page 7: water level and pre-operation check (Korean)

Prepare this information if the issue remains

• —Photos showing the normal water level and heat-exchanger depth
• —Whether the product operated while fully exposed and the approximate situation
• —Any performance change, damage or repeated LED sequence afterward

Check in this order

1. 1.Confirm that it is the supplied original power adapter.
2. 2.Check whether the product is cooling, heating or stable.
3. 3.Check whether the adapter is stacked with others or placed in an enclosed space.
4. 4.Inspect it for cracks, deformation, discolouration or unusual odour.
5. 5.Check the label to ensure that another product's adapter was not connected.

Heat alone does not establish either normal operation or a fault. Stop using the product and contact support with photos if there are cracks, deformation, discoloration, or an unusual odor. This guidance is not an absolute guarantee of safety.

Related manuals

• —Product Manual · PDF page 5 / printed page 7: original adapter, ventilation and electrical safety (Korean)
• —Product Manual · PDF page 6 / printed page 9: 12V, 7A and 84W rating (Korean)

Prepare this information if the issue remains

• —Photos of the complete adapter, label and any damaged area
• —Photos of the adapter location and surrounding ventilation
• —Cooling, heating or stable state when hot, and whether an unusual odour is present

Check in this order

1. 1.Disconnect the power adapter and water-temperature sensor.
2. 2.Remove the product from the aquarium and keep the detached controller in a dry place.
3. 3.Inspect the heat sink and intake/exhaust areas for dust, debris and grease.
4. 4.Clean the heat sink with air spray, a vacuum cleaner or a soft brush.
5. 5.Confirm that the product is fully dry and correctly assembled before reinstalling it.

Do not immerse the controller or disassemble the product. Cleaning needs vary by environment, so this page does not specify one fixed interval.

Related manuals

• —Product Manual · PDF page 3 / printed page 3: periodic cleaning (Korean)
• —Product Manual · PDF page 4 / printed pages 5–6: body and heat-sink cleaning (Korean)
• —Product Manual · PDF page 5 / printed page 7: power isolation and soft brush (Korean)

Prepare this information if the issue remains

• —Photos of the heat sink, intake/exhaust areas and fan condition
• —Installation environment and approximate last cleaning date
• —Any continuing cooling reduction or LED fault after cleaning