Frymaster HCP Parts List

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

UHC-P /HCP

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

APRIL 09

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 CABINET IS NOT SUITABLE FOR OUTDOOR USE. WHEN OPERATING TH IS UNIT, IT

MUST BE PLACED ON A HORIZONTAL SURFACE.

THE CABINET 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 CABINET WITHOUT FIRST READING THIS MANUAL.

DO NOT OPERATE THE CABINET UNLESS IT HAS BEEN PROPERLY INSTAL LED AND

CHECKED.

DO NOT OPERATE THE CABINET UNLESS ALL SERVICE AND ACCESS PANELS ARE IN

PLACE AND PROPERLY SECURED.

DO NOT ATTEMPT TO REPAIR OR REPLACE ANY COMPONENT OF THE CABINET UNLESS

ALL POWER TO THE UNIT HAS BEEN DISCONNECTED.

USE CAUTION WHEN SETTING UP, OPERATING, OR CLEANING THE CABINET TO AVOID

CONTACT WITH HEATED SURFACES.

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 s 6-1

Cabinet Service Procedures

1 Functional Description

Power switch

IR port

Menu key

Temperature
Key

Timer key

Timer keys

Figure 1: UHC-P cabinet

1.2 Theory of Operation

The CABINET 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 12­volt 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 CABINET software. All programming of the cabinet is done on the Palm.

NOTE: This manual covers the UHC-P, the original
PDA-programmed cabinet for McDonald’s and the HCP
or Holdmaster, a similar cabinet made for the general
market. UHC-P parts are compatible with the HCP,
except for the heater plates and bezel.

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

Cabinet 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.

Cabinet Service Procedures

Tab and screw
securing top

Figure 2: Four sheet metal 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 will slid forward if necessary.

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

2-1

Under the top

y

Figure 4

Com board

Cabinet Service Procedures

Transformer

Rela

Power
supply

Fuses

Fans

2-2

Cabinet Service Procedures

All the components are readily removed. There are no replaceable components on the circuit boards.
The replacement of a display, distribution or communication board will require re-addressing the
cabinet, covered in Section 3.

2.2 Tests

2.2.1 Transformer

1. Disconnect power to cabinet. Remove side and top panels, unless stacked. See the service

procedures for access instructions, Section 2.1

2. Check for 208VAC at the primary, 12VAC at the secondary terminals.

2.2.2 Power Supply

1. Disconnect power and check all terminals and

connections for loose or disconnected wires.

2. Apply power and check for +5VDC at the J5 terminal

on the communications board, using the center pin for
the positive lead and either adjacent for the negative
lead.

2.2.3 RTD

1. Remove the leads from the suspect RTD and test for

resistance. selected temperatures and resistances are
show in Figure 7, a chart at right.

NOTE: After testing, reconnect all leads to their
original positions.

Sensor

(°F)

60 106.065 15.55
70 108.224 21.11
80 110.380 26.66

90 112.532 32.22
100 114.680 37.77
110 116.825 43.33
120 118.966 48.88
130 121.104 54.44
140 123.239 60.00
150 125.369 65.55
160 127.496 71.11
170 129.620 76.66
180 131.740 82.22
190 133.856 87.77
200 135.969 93.33
210 138.078 98.88
220 140.184 104.44
230 142.286 110.00
240 144.385 115.55
250 146.480 121.11
260 148.570 126.66

Figure 7: RTD resistance chart

Resistance

Sensor

(°C)

2-3