LCQi & LPQi Fault / Error Codes (01, 02, 04, 07, 08), Diagnostics, and MagIQtouch Service Operating Screen Guide

Overview

This article provides technicians with a comprehensive guide for Braemar LCQi and LPQi evaporative coolers, covering:

  • Fault codes and LED indicators.
  • Using the MagIQtouch Service Operating Screen.
  • Salinity probe diagnostics.
  • A step-by-step technician checklist.

1. Fault Codes and LED Indicators

LCQi and LPQi models use a tri-color LED on the electronics module for operational and fault indication.

Normal Operation

  • Green LED double-flash every 2 seconds = Normal operation.

Fault Codes (Red Flashes)

FAULT CODE 01 (1 Red Flash) – Communication Failure

  • Ensure the wall control cable is fitted correctly.
  • Check that wall control cable is in good condition.

FAULT CODE 02 (2 Red Flashes) – Failure to detect water at probes within 20 minutes

After 10 mins of failing to detect water, the Drain Valve will cycle and attempt another closing routine.

  • First check: Fault may be due to a faulty solenoid not allowing water in.
    • Check for voltage at the solenoid when in cooling mode as per the rating on the top of the solenoid.
    • If voltage is correct, confirm that the solenoid is allowing water to flow.
    • If not, replace the solenoid.
  • Ensure water pressure is sufficient (100–800 kPa) to fill and maintain tank level within 20 minutes.
  • In areas of hard or polluted water, blockage of strainer/filter at inlet solenoid may restrict water flow.
  • Water level may be set too low.
  • Ensure probe plug is properly connected.
  • Plug connections at electronic module upside down or misaligned.
  • Water too pure for probes to sense.
  • Pressure build-up in pipes can lock solenoid valve when non-return isolation valve is used in supply line. Use a ball valve, NOT a non-return shut-off valve.
  • Check drain valve is closing.

FAULT CODE 04 (4 Red Flashes) – Failure to clear probes during drain within 20 minutes

After 10 mins of continuing to detect water, the Drain Valve will cycle and attempt another opening routine.

  • Check drain valve opens, and water drains from tank without obstruction.
  • Excessive drain hose length or bends cause air locking and slow water drain.
  • Build-up of foreign material in drain hose restricts water flow.
  • Screws used to fix hose to drain adaptors restricting water flow.
  • Drain valve has failed to open when drain initiated.
  • Inlet water solenoid not shutting off water when drain open. Water will only flow one way through inlet solenoid valve. If directional arrow is incorrect, valve will not shut off.
  • Debris interfering with water sensor probes.
  • Probes not clipped onto mounting brackets.
  • Check cooler is level and water drains quickly.

FAULT CODE 07 (7 Red Flashes) – Motor Error

WARNING: Motor/Fan could re-start without warning as the controller attempts to re-start the motor within 30 seconds of initially failing this fault code.

  • Ensure the motor power cable is fitted correctly to the control electronics.
  • Ensure the motor communication cable is fitted correctly to the control electronics.
  • If connections are intact and no physical damage to motor cables and plugs is found, there is potential that damage has occurred to the inverter PCB inside the motor.
    This item is not serviceable, and therefore we suggest replacing the entire motor assembly (includes inverter PCB).
  • After replacement, restart the cooler and confirm normal operation.

FAULT CODE 08 (8 Red Flashes) – Supply Voltage Error

WARNING: Motor/Fan could re-start without warning as cooler will re-start when voltage returns to normal.

  • Fan shuts down when supply voltage drops below 93V.
  • Measure incoming voltage (should be 216–253V).
  • If low, check supply circuit or advise customer to correct mains issue.
  • Cooler will auto-restart when voltage normalizes.

2. MagIQtouch Service Operating Screen

Access via: Menu → Settings → Service Menu → Service Operating Screen

Functions Available

  • Manual Component Control:
    • Fan ON/OFF and speed adjustment.
    • Pump ON/OFF.
    • Drain valve activation.
    • Solenoid valve control.
  • Water Management:
    • Observe water level during fill/drain.
    • Trigger fill or drain cycles.

Important:

  • Operate one component at a time to avoid issues.
  • Monitor tank water level to prevent overflow or dry running.
  • This screen does NOT display motor overload or voltage errors—those are indicated by LED codes on the electronics module.

3. Salinity Probe Diagnostics

Salinity probes ensure correct water quality and trigger drain cycles when salts exceed set limits.

Testing Procedure

  1. Visual Check:
    • Ensure probes are clean and fully immersed at correct water level.
    • Correct water level = 5 mm below float valve base.
  2. Electrical Check:
    • Set multimeter to ohms mode.
    • Pin readings:
      • Pin 1 (Blue): ≈0 Ω
      • Pin 2 (Black): ≈0 Ω
      • Pin 3 (Brown): ≈0 Ω
    • Reading >18 Ω indicates faulty probe.
  3. Controller Feedback:
    • Salinity LED flashes:
      • 1 Flash = Below set point.
      • 2 Flashes = Above set point.
      • 3 Flashes = Timed drain mode.
      • 4 Flashes = Bleed tray (no drain valve).
      • 5 Flashes = Thermostatic control (no water).

4. Technician Checklist

Before Service

  • Isolate power and water supply.
  • Confirm correct water level (≈5 mm below float valve base).
  • Inspect pads, pump, drain valve, and solenoid for wear or blockages.

During Diagnostics

  • Use MagIQtouch Service Operating Screen for manual component testing.
  • Test pump, solenoid, and drain valve individually.
  • Check salinity probe continuity with multimeter.
  • Verify fan operation and motor COMMS cable connection.

After Service

  • Run cooler in COOL mode.
  • Confirm even water distribution across pads.
  • Check for leaks and proper drain operation.
  • Clear fault codes and reset system if required.