Frymaster 47 Series Service & Parts Manual page 11

IFBs 806-3398 and 106-0386:
Consequently, servicers are likely to encounter three different interface board designs. Although the
boards differ slightly in appearance, basic functioning and electrical connections are the same from
one to another. In the earlier design 806-3398 interface board (used between June 1996 and July
1999), the diagnostic LEDs are arrayed in a row across the bottom of the board as shown in the left-
hand illustration below. In later design 806-3398 interface boards (and in the 106-0396 interface
boards that replaced them in current production fryers), the LEDs (labeled D1 though D7) are
scattered around the board as shown in the right-hand illustration. The primary difference between
the earlier design boards and the later design boards is the combining of the separate blower motor
relay (K4) and the heat relays (K1 and K2) into a pair of replaceable relays (K2 and K3) in the latter.
Also, the 106-0386 interface board has an additional fuse located in the upper right hand corner.
Prior to June 1996, a board with replaceable relays very similar in appearance to the
was used. It is distinguished from the
relay for the left vat (K1 in early 806-3398 IFBs or K2 in later design 806-3398 and
is not present. On units with basket lifts, K3 and K5 (early 806-3398) or K1 and K4 are present.
NOTE: Although the printing on many boards indicates 2 Amp fuses, 3 Amp fuses (P/N
must be used.
SOUND
1
1 4
2
J2
2 5
GND
3
3 6
3 6 9 12
2 5 8 11
J1
1 4 7 10
K3 K4
GND
BLOWER
V2D
MOTOR
PWR
AD
HEAT
AS
RELAY
V2S
K1
1 2 6
GND GV PWR AL 12V AIR 24V AL PWR GV
EARLIER DESIGN INTERFACE BOARD P/N 806-3398
These standard interface boards are also used in a number of fryer types besides the 47 Series. The
information contained in this section applies to 47 Series applications ONLY.
Earlier design 806-3398 boards (used from June 1996 through July 1999) contain two heat relays
(K1 and K2) that switch 24VAC to the ignition and gas valve circuits when the computer/controller
heat logic circuit calls for heat. Relay K4 switches 120VAC to the blower motor when either K1 or
K2 closes. The relays on these boards are soldered on – if one fails, the whole board must be
replaced.
The later design 806-3398 (and
have only two relays. In this design, K2 and K3 are double-pole-double throw (dpdt) relays that
supply 24VAC to the ignition and gas valve circuits, as well as 120VAC to the blower motor. The
relays on this board plug into sockets. If a relay fails, it can be replaced.
47 SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
The 47 Series of fryers has been in production for many years.
106-0386
GND
13
7 10
8 11 14
9 12 15
3 6 9 12
2 5 8 11
J3
1 4 7 10
K5
GND
V1D
RELAY
PWR
ALR
HEAT
V1S
RELAY
K2
3 4 5
GND
106-0386 boards that replaced them in current production fryers)
board by the absence of fuses. On full vat units, the
SOUND
J2
1
1
2
2
GND
3
3
3 6 9 12
This Fuse is NOT
J1
2 5 8 11
present on 806-3398 IFB.
1 4 7 10
D1
GV
GND
V2D
PWR
AD
HEAT
AS
RELAY
D2 PWR
AND
V2S
BLOWER
MOTOR
RELAY
GND
K2
LATER DESIGN INTERFACE BOARDS P/N 806-3398 and
1-6
106-0386 board
106-0386 IFBs)
807-3843)
GND
4 7 10 13
F2 I g ni t ion
D7
2 AMP Module
5 8 11 14 D6
6 9 12 15 AIR
12V
3 6 9 12
J3
2 5 8 11
1 4 7 10
K1
D5
GV
Blower
Motor
GND
2 Amp
K4
V1D
D3
PWR
HEAT
ALR
24V
RELAY
AND D4
V1S
BLOWER
PWR
MOTOR
RELAY
GND
K3
106-0386