Jenn-Air JGCP548HL, JGCP636HM, JGCP548HM, JGCP648HL, JGCP748HM Tech Sheet

...

FOR SERVICE TECHNICIAN’S USE ONLY

Tech Sheet Do not remove or destroy

WARNING

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

W11266565B

11/18

FOR SERVICE TECHNICIAN’S USE ONLY

IMPORTANT: Electrostatic Discharge (ESD) Sensitive Electronics

ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.

■ Use an antistatic wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the

appliance

-OR-

Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.

■ Before removing the part from its package, touch the antistatic bag to a green ground connection point or

unpainted metal in the appliance.

■ Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.

■

When repackaging failed electronic control assembly in antistatic bag, observe above instructions.

Table of Contents

DIAGNOSTICS ..................................................................................................................................3

TROUBLESHOOTING ....................................................................................................................... 3

COOKTOP COMPONENT LOCATION ............................................................................................. 6

STRIP CIRCUITS ...............................................................................................................................7

Diagnostics

Unplug cooktop or disconnect power before performing the following checks:

■ A potential cause of a control not functioning is corrosion on connections.

Observe connections and check for continuity with an ohmmeter.

■ All tests/checks should be made with a VOM or DVM having a sensitivity

of 20,000 ohms per volt DC or greater.

■ Check all connections before replacing components, looking for broken

or loose wires, failed terminals, or wires not pressed into connectors far enough. Damaged harness must be entirely replaced. Do not rework a harness.

■ Resistance checks must be made with power cord unplugged from

outlet, and with wiring harness or connectors disconnected.

Troubleshooting

Unplug cooktop or disconnect power before performing the following checks. Reassemble all parts and panels before operating.

Problem Possible Cause Action

No spark when any control is turned 1. No power to unit. 1. Check that power is on.

2. Control connection not correctly plugged in. 2. Check connector for contamination or loose

3. Bad ground connection. 3. Check all ground connections for continuity.

4. Burners not properly grounded. 4. Check ground continuity.

5. Spark leads damaged, sparking onto nearby

metal.

6. Grease or dirt buildup around electrode. 6. Clean and dry electrode and cap.

7. Spark gap to burner cap not correctly set. 7. Check that the cap is correctly seated on burner.

8. Switch gas valve fails. 8. Check the switch gas valves and wire connections.

connections.

5. Visually check in dimmed light for sparking to

nearby metal.

FOR SERVICE TECHNICIAN’S USE ONLY

Problem Possible Cause Action

No spark when one control knob is turned 1. Bad connection to switch harness or faulty

Power to reignition module OK. One electrode is not sparking.

Intermittent sparking after ignition 1. Generally the cause is bad ground which can

reignition module.

1. Faulty spark lead/electrode or faulty reignition

control board.

be caused from a buildup of cooking oils, solids, cleansers, etc.

2. Burner ports blocked. 2. Clean and dry burner and electrode. Remember,

3. Flame sense fails. 3. The unit will spark if the current sensed by the

4. Spark gap to burner cap not correctly set. 4. Check that the cap is correctly seated on burner and

5. Faulty reignition control board. 5. Replace after checking all of the above.

1. Check to ensure switch harness connection is OK.

2. Check that the wires are correctly attached to

switch.

3. Check that switch is correctly assembled on gas

valve shaft.

4. Replace switch harness if necessary.

1. Easy Check: To determine if reignition module or

lead is faulty, swap spark lead to another terminal and check for spark.

1. Clean and dry all parts and ensure burner is

correctly seated.

ame must be near electrode to sense current.

reignition control board drops below to a certain level. Generally occurs at simmer or when the ame is unstable caused by wind, etc. Check on high power if sparking stops. Adjust gas valve regulation screws. Clean and dry burner and electrode.

check electrode integrity.

Problem Possible Cause Action

Sparking occurs, and burner does not light. 1. No gas to appliance. 1. Verify proper gas supply.

2. Burner not correctly seated. 2. Check and test.

3. Burner port wet or dirty. 3. Clean and dry. Also clean electrode.

Continual sparking after ignition 1. Electrode wire does not correspond to relevant

reignition module output.

2. Burner ports blocked or wet and not allowing

electrode to sense the current.

3. Spark gap to burner cap not correctly set. 3. Check that the cap is correctly seated on burner.

4. Bad ground connection. 4. Check all ground connections for continuity.

5. Faulty electrode. 5. Verify electrode integrity.

6. Inversed electrode wires. 6. Check electrode wire colors and correspondent

7. Faulty reignition control board. 7. Replace and test (only after checking all of the

1. Check that the electrode wire is assembled

according to electrode map assembly instruction located close to reignition module.

2. Clean and dry ports and electrode.

NOTE: The unit may still spark even if the spark lead

is faulty, but the unit will not detect ame.

burner.

above).

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