TROUBLESHOOTING THE WATER HEATING SYSTEM

Each of the following checks is to be performed with the unit connected to the electrical power supply, with the unit ON and calling for heat, and with at least enough water in the cookpot to cover the lower water-level sensor.

CHECKING THE

HIGH-LIMIT

THERMOSTAT

CHECKING

THE TEMPERATURE

PROBE

(on units with computers

because water boils in

Simmer Mode or water is too cool in Simmer Mode.)

Is resistance

 

High-limit has

between outside

No

terminals

failed. Replace.

 

1 ohm or less?

 

 

Yes

High-limit is OK.

CHECKING THE

ELEMENT

(24VAC Power Supply

verified to be OK..)

With sufficient water in the cookpot to cover the heating element, place the POWER switch in the ON position and the CYCLE switch in the SIMMER position, OR press the computer ON/ OFF switch to the ON position.

Check probe resistance between Pins 6 a nd 8 on IFB 12 - p i n c o nn e ct o r . Resistance should be:

Approx 552 ohms @ 60ºF (16ºC) Approx 655 ohms @ 100ºF (38ºC) Approx 1000 ohms @ 212ºF (100ºC)

Check resistance between each pin and ground. Resistance on BOTH should be 2 mega-Ohms or greater.

Are BOTH readings

 

 

 

Probe is open or is

 

No

 

within specification?

 

 

shorted. Replace.

 

 

 

Yes

Probe is OK.

 

 

 

 

 

 

 

Is 24VAC

Was there an

 

 

 

present on the

 

 

 

CYCLE switch

audible snap indicating the

 

 

 

 

No

 

 

 

 

OR

contactor coil

 

 

 

 

 

 

 

 

 

 

on Pin 4 of the 15-pin

energized?

 

 

 

 

 

 

connector on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the IFB.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probable causes,

 

 

 

 

 

 

 

Ohm out elements (Pins 1 & 6,

 

 

 

in order of probabilty,

 

 

 

are failed switch or

2 & 5, 3 & 4). If resistance

 

 

 

contactor.

is NOT 15 ±3 Ohms, the element

 

 

 

 

 

 

 

has failed. Replace.

 

 

 

 

 

 

 

No

 

 

 

 

CHECKING

 

 

THE THERMOSTAT

Probable causes, in

 

(on units with manual

order of probabilty, are

 

controls.)

failed computer or IFB.

 

 

 

Set thermostat knob to OFF position.

 

Check resistance across terminals.

 

Resistance should be infinite.

 

Set thermostat to its highest setting.

 

Check resistance across terminals.

 

Resistance should be less than 1 ohm.

Thermostat is open or

No

Are BOTH

is shorted. Replace.

readings correct?

 

Yes

Thermostat is OK.

7-17

Page 81
Image 81
Frymaster 17ECS, ESW, EWBS manual Checking HIGH-LIMIT Thermostat Temperature Probe

17EC, 17ECS, EWBS, ESW specifications

Frymaster, a leader in the foodservice equipment industry, offers a range of fryers designed to enhance productivity and quality in commercial kitchens. Among these, the Frymaster ESW, EWBS, 17ECS, and 17EC models stand out due to their innovative features, advanced technologies, and user-friendly designs.

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