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Induction Cooktop (CTI) Series

Induction Cooktop (CTI) Series

Troubleshooting Guide

5-2

#821684 - Revision B - March, 2013

DIAGNOSTICS MODE

To enter Diagnostics Mode, the unit must be in Lock
Mode (see Section 3, Electronic Control, page 3-6, for a
description of how to put the unit into Lock Mode).
Press and hold the universal OFF key for 5 seconds,
the controls will enter Diagnostics Mode 1.  A beep will
sound after 5 seconds to let the user know that they can
lift their finger from the key (See Figure 5-1).

NOTES:

If any other keypad sensor detects another input
signal, Diagnostics Mode will not engage.

If the universal OFF key is not released after seven
seconds, Diagnostics Mode will be cancelled and
not engage.  The unit will return to Lock Mode.

All Induction Coils are disabled and there will be no audible signals during Diagnostics.

If after 60 seconds no other inputs are detected, the controls exit Diagnostics Mode and return to Lock Mode.

While in Diagnostics Mode, 1200W will refer to front 1200W coil for all sized cooktops, and 3000W will refer to
the control that operates the rear 3000W boost coil for all sized cooktops.

Upon entry to Diagnostics Mode, the LED Test will automatically start.  To step through tests, the user will use the “+”
and “-” keys of the 3000W coil (the rear element, HI-POWER).  The 3000W control will step up one LED for each
test to identify which test is being performed.  See the individual descriptions for each model, in Figure 5-2 below).

OFF

CLEAR

Figure 5-1.  Diagnostic Mode.

Press and Hold the OFF Key for 5 sec-
onds.  Unit will beep after 5 seconds

Figure 5-2.

LED Test (First Test)

1.

Upon entry to Diagnostics Mode, the LED Test will automatically start.  To step through tests, the user will use
the “+” and “-” keys of the 3000W (the rear element, HI-POWER) inductor (See Figure 5-2).

2.

During this test, all LEDs will stay on.  Press the “+” or “-” keys of the 1200w inductor to turn all LED’s on or off.

3.

To step back to the last known state test, press the “-” key under the HI-POWER Control Zone that pertains to
the appropriate Model being Diagnosed.

COOLING FAN TEST (Second Test)

1.

To enter Cooling Fan Test, press the “+” key of the 3000W inductor.  The bar graph will show 2 LEDs.

NOTE: 

This Test is only used for units that include a 120mm cooling fan (prior to serial #17600000).

2.

The 1200W inductor will have all of the bar graph lights illuminated.

3.

The cooling fan relay will turn ON causing the cooling fan to turn ON.

4.

Press the “-” key of the 1200W inductor, all bar graph LEDs (1200W Control only) and fan will turn OFF.

5.

Press the “+” key of the 1200W inductor, all bar graph LEDs  (1200W Control only) and fan will turn ON.

6.

Press the “-” key on the 3000W inductor to step back to the LED Test.

Summary of Contents for CTI Series

Page 1: ...Troubleshooting Guide 27 subzero com 800 222 7820 CT Induction Cooktop Service Manual ...

Page 2: ...the and keys of the 3000W coil the rear element HI POWER The 3000W control will step up one LED for each test to identify which test is being performed See the individual descriptions for each model in Figure 5 2 below OFF CLEAR Figure 5 1 Diagnostic Mode Press and Hold the OFF Key for 5 sec onds Unit will beep after 5 seconds Figure 5 2 LED Test First Test 1 Upon entry to Diagnostics Mode the LED...

Page 3: ...l Temperature Test ERROR CODE INDICATOR Fifth Test NOTES See Error Code Chart for a description of the error and action that should be taken If one possible cause of an error code has been corrected reset error history and verify operation Only proceed to other possible sources if problem still exists or if the error reoccurs To clear Error code history press and hold the HI POWER key of the 3000W...

Page 4: ...ce over priority 2 errors If there are no known priority 1 errors recorded the software will record the LKS of the last recorded priority 2 error If there are no priority 1 or 2 errors the Timer dis play will continue to display LS If a priority 1 error should occur the LKS would be recorded and not any subse quent priority 2 error s LKS 1 To enter Last Known State press the key of the 3000W eleme...

Page 5: ... dissatisfaction These errors can be cancelled and will not be displayed again until the user again attempts to start an operational mode Any active function on the CZ for which the error has scope will be cancelled upon generation of the priority 2 error Errors with system scope will apply to all CZ s errors with CZ scope will apply only to the appropriate CZ unless otherwise noted This level of ...

Page 6: ...e control panel will turn off display and shut off all burners If ambient temperature exceeds error tempera ture limit unit will enter Lock Mode until ambient temperature falls within acceptable temp limits The burners will be unavailable until heatsink temperature falls below 194 F 90 C limit Cooktop will enter Lock Mode and display error code An open sensor error will not be recorded until 5 min...

Page 7: ...tween com board and generator 3 fails Cooktop enters Lock Mode and display error code in timer display A watchdog timer will be reset every key release If key release is not seen for determined debounce time control will record error A watchdog timer will be reset every key release If key release is not seen for determined debounce time control will record error and effected burner unavailable unt...

Page 8: ...d burner will shutdown The effected burner will shutdown The effected burner will shutdown 2 2 2 2 2 2 2 2 2 2 2 2 2 2 E30 E31 E32 E33 E34 E40 E41 E42 E43 E44 E45 E50 E51 E52 Generator 1 Burner F FR FC ON LED Failure Generator 1 Burner R RR RC ON LED Failure Generator 2 Burner RL ON LED Failure Generator 2 Burner FL ON LED Failure Generator 3 Burner RR ON LED Failure Generator 1 Burner R RR RC sen...

Page 9: ...an Detection Glass Surface too warm Electrical Noise spike Defective Thermistor Bad Control Board Incorrect Pan Type Unit not wired properly Verify Glass Temp Below 122 F 50 C Check for other heat sources e g Sun warm pans setting on surface Check for Error Codes follow suggested action Turn Breaker off for 5 min reset and try Check Resistance of Generator Thermistor see Figure 5 4 Replace Control...

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