1. Restore power and call for heat
2. Retrieve stored and active fault codes:
   MagIQtouch → Settings → Service → Fault Log
3. Record:
   • Fault code(s)
   • Lockout level (L0 / L1 / L2)
4. Turn heater OFF
5. Isolate 230 Vac

Confirm:

• All wiring looms fully seated
• No signs of overheating or moisture ingress
• Outlet air thermistor located approx. 3 m along outlet duct

Important Notes

• TQ heaters use White‑Rodgers gas valves
• These valves contain internal rectifiers/diodes
• Standard resistance testing may give misleading readings

✅ Gas valve operation must be confirmed using live voltage AND gas flow

6.2 Combustion Fan Testing

230 Vac Combustion Fan (Single & Two‑Stage)

• Call for heat
• After ~10 s, confirm 230 Vac at fan terminals
• Resistance (isolated): 40–44 Ω

✅ Voltage present but fan not running → Replace fan

24 Vdc Combustion Fan (Modulating)

• Supply: 24 Vdc (pins 1–5)
• Control: >10 Vdc (pins 4–5 during run‑up)

✅ Voltage correct, fan not running → Replace fan

6.3 Combustion Fan Resistor (Two‑Stage Only)

❌ Open circuit → Replace resistor

6.4 Room Fan Systems

Click link below to view

Room Fan Motor Testing for TQ/TQM Heaters: Seeley International Pty Ltd

FCC Room Fan (Standard TQ Models)

Operation:

• Starts ~10 s after ignition
• Gradual speed ramp
• Modulates from outlet thermistor

Winding Resistance (Power OFF)

Capacitor Testing:

•    Disconnect power and discharge the capacitor safely.

•    Use a multimeter with capacitance mode or a dedicated capacitor tester.

•    Compare measured capacitance to the rated value (typically printed on the capacitor).

•    A reading significantly lower than the rated value or no reading at all indicates a faulty capacitor.

•    Visually inspect for bulging, leakage, or discoloration.

IMPORTANT NOTE: Check correct value from service and spare parts manual NOT what is on motor label as the capacitors change depending on the heater model

Additional Checks:

•    Inspect for physical obstructions or debris in the fan housing

•    Confirm ICS is receiving power and functioning correctly

•    Check for blown fuses or tripped breakers

•    Inspect for signs of overheating or burnt components

________________________________________

Fan Does Not Reach Full Speed

Verify:

•    Maximum speed setting

•    Zoned operation speed

•    Programmed time period speed

Voltage Check:

To verify correct voltage supply to the motor, follow the steps below:

Run Voltage Measurement:

Using a multimeter, measure the voltage across terminals “A” (Active) and “N” (Neutral) at the ICS (Integrated Control System).

This voltage corresponds to the motor’s run winding and will vary depending on the fan speed selected by the heater.

Start Voltage Measurement:

Additionally, measure the voltage across terminals “CAP” (Capacitor) and “N” (Neutral) at the ICS.

This voltage energizes the start winding via the capacitor and is typically higher than the voltage across “A” and “N”, especially during motor startup.

Note: The presence of voltage at “CAP” and “N” confirms that the start capacitor circuit is functioning. If there is no voltage present on these terminals, then strongly recommend testing the separate Room Fan Capacitor connected to CAP and CAP on the ICS.

6.5 Transformer

• Input: 230 Vac (Brown ↔ Blue)
• Output: ~24 Vac (Black ↔ Black)
• Resistance: ~65 Ω

❌ Out of range → Replace transformer

6.6 Over‑Temperature Switches (OT1 / OT2 / OT3)

• Heater isolated
• Continuity test
• All must be closed when cold
• OT3 requires manual reset

6.7 Outlet Air Thermistor

❌ Incorrect or unstable → Replace thermistor

6.8 Zone PCB (If installed)

• Green LED ON = board powered
• Check fuse
• Damper output:
  • 230 Vac systems → 230 Vac
  • 24 Vac systems → 24 Vac

❌ No output → Wiring or PCB fault

7. Completion Requirements

Before leaving site:

✅ All wiring restored and secured
✅ Gas pressure test points sealed
✅ Fault codes cleared
✅ Heater completes full ignition and run cycle