Troubleshooting the W-2 Slow Heat Up Warning

Overview

The W2 slow heat up error occurs when three out of the last heat-ups are recorded as slow. The quantum fryer measures the heat-up rate from 270°F (132°C) to 310°F (154°C), and if the time taken to heat up is too slow, it records this as a slow heat-up.

Call Avoidance

To help the end user resolve the issue without a service call:

• Check Power Cords: Unplug and reconnect the power cord to ensure there is no low voltage condition.

• Check Breakers: Verify that the breakers are not tripped. Turn the breaker off and back on to ensure proper contact.

Field Troubleshooting

If call avoidance steps do not resolve the issue, proceed with the following field troubleshooting steps:

Recommended Parts:

• Heating elements

• Contactors

• Breaker

• Amp sensors

• Bus bars

• Control board

• Wire

Recommended Tools:

• Basic hand tools

• Multimeter

• Amp clamp

Troubleshooting

1. Checking Error Log and amp draw: Look for a low amps W-7 error message. This check may help to narrow down if the issues are isolated to an upper or lower heating element to more quickly pinpoint the fault. Review amp readings, 32 amps 28 amps is nominal.

2. Checking Incoming Voltage Checks: Verify line voltage is present between all three phases at both the incoming side of the primary and secondary contactors for the faulty heater if known, or both heaters if unknown. If voltage is low or not present, troubleshoot back to the source through the breakers, wiring, terminal block, power cord receptacle, and to the breaker at the restaurant side to find faulty component or loose connection. Once found, replace the faulty wiring or component.

NOTE: Loose connections are sometimes identified by discolored or burnt wire. If no fault with voltage, continue to step 3.

3. Checking Voltage to Heaters (Coils): With power switch turned on and a demand for heat, check voltage between all three phases for each contactor. If reading is low or 0 for any contactor, proceed to step 4, otherwise check amp draw at each heating element wire from top of contactor. there should be 18.5 13.8 amps present on all six wires when there is a demand for heat. If your amp draw is 0 or lower than 10% of this on any wire, check connections, if connections are tight, replace respective heater.

4. Checking Coil Voltage on Contactors: Ensure 24VAC between the blue or yellow wires to the primary contactor coil when the power switch is turned on, if no voltage, ensure control has a demand for heat, check coil wire connections at control and if tight, replace control. Ensure 24VAC between the blue or yellow wires to the secondary contactor coil when there is a demand for heat, if no voltage, ensure control has a demand for heat, check coil wire connections at control and if tight, replace control. If coil voltage is present, contactors pull in, but voltage is low or missing, replace contactor.