Frymaster HC-P Service Manual

Service, Parts Manual for 4, 2-Slot and Narrow Models

UHC-P/HC-P

Frymaster, a member of the Commercial Food Equipment Service Association, recommends
using CFESA Certified Technicians.

*8196044*

24-Hour Service Hotline

1-800-551-8633

Price: $6.00

819-6044

June 2006

NOTICE

IF, DURING THE WARRANTY PERIOD, THE CUSTOMER USES A PART FOR THIS ENODIS
EQUIPMENT OTHER THAN AN UNMODIFIED NEW OR RECYCLED PART PURCHASED DIRECTLY
FROM FRYMASTER DEAN, OR ANY OF ITS AUTHORIZED SERVICE CENTERS, AND/OR THE
PART BEING USED IS MODIFIED FROM ITS ORIGINAL CONFIGURATION, THIS WARRANTY WILL
BE VOID. FURTHER, FRYMASTER DEAN AND ITS AFFILIATES WILL NOT BE LIABLE FOR ANY
CLAIMS, DAMAGES OR EXPENSES INCURRED BY THE CUSTOMER WHICH ARISE DIRECTLY
OR INDIRECTLY, IN WHOLE OR IN PART, DUE TO THE INSTALLATION OF ANY MODIFIED PART
AND/OR PART RECEIVED FROM AN UNAUTHORIZED SERVICE CENTER.

THE UHC-P IS NOT SUITABLE FOR OUTDOOR USE. WHEN OPERATING THIS UNIT, IT

MUST BE PLACED ON A HORIZONTAL SURFACE.

THE UHC-P IS NOT SUITABLE FOR INSTALLATION IN AN AREA WHERE A WATER JET CAN

BE USED. THIS APPLIANCE MUST NOT BE CLEANED WITH A WATER JET.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN

THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

DO NOT OPERATE OR SERVICE THE UHC-P WITHOUT FIRST READING THIS MANUAL.

DO NOT OPERATE THE UHC-P UNLESS IT HAS BEEN PROPERLY INSTALLED AND

CHECKED.

DO NOT OPERATE THE UHC-P UNLESS ALL SERVICE AND ACCESS PANE LS ARE IN

PLACE AND PROPERLY SECURED.

DO NOT ATTEMPT TO REPAIR OR REPLACE ANY COMPONENT OF THE UHC-P UNLESS

ALL POWER TO THE UNIT HAS BEEN DISCONNECTED.

USE CAUTION WHEN SETTING UP, OPERATING, OR CLEANING THE UHC-P TO AVOID

CONTACT WITH HEATED SURFACES.

THIS PAGE INTENTIONALLY LEFT BLANK.

Table of Contents

Theory of Operation 1-1

Service Procedures 2-1

Re-addressing Cabinet 3-1

Troubleshooting 4-1

Illustrated Parts List 5-1

Wiring Diagram 6-1

UHC-P Service Procedures

1 Functional Description

Power switch

Menu key

Temperature
Key

Timer key

Timer keys

Figure 1: UHC-P cabinet

1.2 Theory of Operation

The UHC-P operates on 208-250VAC 50 or 60 cycle single-phase power. The main switch activates
a relay, which supplies line voltage to two distribution boards, two cooling fans and a 12-volt
transformer, which supplies a power supply. The power supply provides 5VDC to the
communication board and the distribution boards.

A ribbon cable connects the communication board to both distribution boards, connecting at J9.
Ribbon cables, which carry 5V DC, also connect the distribution boards to the displays. The
resistance of RTDs attached to the heater plates is monitored by the distribution boards. The board
switches power through solid-state relays to the heater plates when the resistance, which is used as
an indicator of temperature, falls out of the range for the product held in the cabinet.

The switch, transformer, communication board, cooling fans and power supply are mounted under
the top of the unit. There is a small dark lens portal on the upper right side of the cabinet, which
allows infrared communication between the cabinet and a Palm Pilot. The distribution boards are
mounted on the left side (as viewed from the front).

The parameters for holding temperatures are transferred to the cabinet’s communication board via a
Palm Pilot with special UHC-P software. All programming of the cabinet is done on the Palm.

IR port

Note: The illustrations
for these service
procedures are of the 4­slot full size UHC-P. The
procedures are similar
for the 2-slot and the
narrow models.

1-1

UHC-P Service Procedures

1.3 Start Up Indicators and Test Points

Upon startup, the communication board beeps. On the
distribution boards, an LED flashes rapidly for a few
seconds and then slows to one flash every two seconds.
The displays will show the version number of the
cabinet’s firmware and then the slot’s status.

LED

1-2

2 Service Procedures

DANGER: Failure to disconnect the power supply before servicing could result in serious
injury or death. The cabinet power switch DOES NOT disconnect all incoming power to the
cabinet.

The top is held
in place by
screws behind
the side panel.

The side panels are
secured with two
screws at the base.

UHC-P

Tab and screw
securing top

Figure 2: Four sheetmetal tabs hold the top in place.
Remove these screws at each corner and lift off the
top.

Remove the
bottom screw
and loosen
the top one to
tilt out the
front panel.

Figure 1: The side panels must be removed to
access the component shelf.

2.1 Accessing the Electronic Components

1. The component shelf is accessed by removing two
screws on each side of the unit. See figure 1.

2. Lift and remove the sides, which exposes screws
that hold the top in place. See figure 2.

3. The front panel, which holds the switch and the IR
lens, can be rotated forward by removing a screw on
either side and loosening two others. See figure 3.
With the removal of four more screws, the
component shelf can then be slid forward if
necessary.

Figure 3: Remove the screws which secure the
component shelf, allowing the shelf to be pulled
forward.

2-1

UHC-P

Fuses/MOV

Power supply

Transformer

Relay

Fans

Communication cable

Communication board

Switch

Figure 5: Component shelf

Heater leads

RTD leads

Communication
cable

Display cable

5VDC power

Terminal block

Figure 6: The distribution
boards are on the left side of the
cabinet.

2-2