Frymaster HLZ 18, HLZ 22 service manual Relays, Computer, Tests Input power

Page 17

10 Diagnostic Tests for HLZ

10.1 Relays

The following tests are conducted with power applied.

Symptom: Air heater or plate heater will not heat.

Symptom: Air heater or plate heater over

heats. NOTE: Unit will display PROB if overheated. The probes are producing out of range resistance. Allow unit to cool before checking probes.

Tests:

4

 

 

4

2

 

 

2

Input

Output

Input

Output

1

 

 

1

3

 

 

3

Viewed from the front of the HLZ, the air heater relay is nearest the heater plate; the heater plate relay is nearest the front of the unit.

With power supplied and computer turned on, measure DC voltage across input terminals of relay. With computer calling for heat ( dot illuminated on display), the reading should be approximately 12 VDC. Failure to measure DC voltage points to a problem with the computer or connection.

With power supplied and computer turned on, measure AC voltage across output terminals of relay. With computer calling for heat (dot illuminated in display), the reading should be .6 - .9 VAC. Reading line voltage with the computer calling for heat, indicates a failure of the computer to supply the necessary DC voltage to close the relay or a failure of the relay.

10.2 Computer

Symptom: Faulty or no display.

Symptom: No response to buttons.

Tests:

Input power

With the computer disconnected, check for 12VAC between pins 1 and 3.

3 6 9 12 15

2 5 8 11 14

1 4 7 10 13

The pins in the computer plug are counted bottom to top, left to right starting with the pin marked by a protruding ridge.

Frymaster L.L.C., 8700 Line Avenue 71106, P.O. Box 51000, Shreveport, Louisiana 71135-1000

318-865-1711 FAX 318-862-2394

Printed in the United States

Service Hotline

Page 15

 

1-800-24-FRYER

 

Image 17
Contents Heated Landing Zone HLZ 18 and HLZ Table of ContentsPage Model Number Serial Number Voltage Item Part Number Warranty StatementParts Ordering and Service Information Quantity Needed Operation INSTALLATION/SETUPHeated Landing Zone Heater Plate HLZ MODEL/COMPONENT IdentificationCalibration Socket Air HeaterHLZ Computer Operation and Programming Programming TemperatureOperation D¡ y Air tower No computer display no flow fromNo flow from air tower After 20 minutes of operationInterior view of an HLZ Cowl Assembly removed Service InformationReplacing Solid State Relays Replacing Air Thermocouple and Air RTD Probe Opening the Air Delivery TowerEasier to remove. Accessing the Plate and Air HeatersHeat makes Adhesive holding Platen in place moreReplacing Hi-limit Apply gasket or sealant along this edge Tests Input power Symptom Faulty or no display Symptom No response to buttonsRelays TestsTransformer Output powerPlate Heater RTD TestSymptom Overheats Test Symptom Overheats TestsPlate Heater Latching RelayHi-limit Symptom No display on controller

HLZ 18, HLZ 22 specifications

The Frymaster HLZ series, specifically the HLZ 18 and HLZ 22, represents the forefront of commercial frying technology, designed to meet the needs of various food service establishments, from restaurants to food trucks. Both models bring outstanding features and innovative technologies that enhance cooking efficiency, food quality, and user convenience.

The HLZ 18 has a frying capacity of 18 pounds of oil, while the HLZ 22 can hold up to 22 pounds, making them ideal for high-volume operations. One of the standout features of these models is their Advanced Oil Management System, which optimizes oil life and quality, ensuring that food maintains its flavor while reducing operational costs. This system helps in tracking oil usage and alerts users when it’s time to filter or replace oil, significantly extending the life of the cooking oil and providing cost savings.

Both fryers are equipped with a state-of-the-art digital controller that offers precise temperature settings and customizable cooking timers. This technology ensures perfectly cooked foods every time, catering to various cooking needs from frying chicken to making perfectly golden fries. The electronic control system also features a built-in boil-out cycle, simplifying the cleaning process, which is critical in maintaining hygiene standards in commercial kitchens.

In terms of safety, the HLZ series incorporates an innovative cool zone design that prevents food debris from burning, further enhancing food quality and simplifying the cleanup process. The added filtration system not only enhances performance but also decreases the likelihood of cross-contamination, making the cooking process more hygienic.

The HLZ 18 and HLZ 22 are built with durability in mind. Their stainless steel construction not only adds to their aesthetic appeal but also ensures longevity and ease of maintenance. Heat is evenly distributed within the fryers, thanks to their efficient heating elements, which leads to shorter cooking times and more consistent results.

Both models support various frying baskets, allowing users to customize their cooking setup according to the menu demands. This versatility makes them suitable for establishments that require flexibility in their food offerings.

In conclusion, Frymaster’s HLZ 18 and HLZ 22 fryers blend innovation with practicality, providing a superior frying experience. Their advanced features and technologies are tailored for efficiency, safety, and quality, making them an excellent choice for any commercial kitchen looking to optimize their frying operations. With these fryers, food service professionals can expect not only enhanced productivity but also a significant improvement in the quality of their fried food offerings.