Unox MINDMaps BAKERTOP, Service Manual

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GaS CirCuit – eleCtriCal SySteM
SPIDO.Gas
TM
electrical system is composed of:
a. One power board for the CHEFTOP MIND.Maps™,
b. Two power boards for the New CHEFTOP MIND.Maps™ BIG,
c. One flame control board for European models; two flame control boards for US models,
d. Two igniters,
e. Two pairs of ignition electrodes,
f. One flame detection electrode,
g. Two pair of ignition cables,
h. One flame detection cable,
i. One blower for all European models except XEVC-2021-GPX, XAVC-16FS-GPX, and also the New
CHEFTOP MIND.Maps™ BIG,
j. One gas valve.
The European gas valve is powered by the power board at around 230 V DC; the US gas valve is powered
by the power board at 120 V DC.
In the US gas system, the two flame control boards work synchronized, therefore both flame control
boards must detect the flame at the same time or the unit will lock out.
European electrical system
European gas ovens came with power board PE2021A up to the end of 2016, PE2021B was used from the
beginning of 2017 and PE2021C was used from the September 2019. The main features of the board are:
■ Control the 230 V AC loads of the oven such as motors, contactors, braking elements, solenoid valve,
chemical pump, cooling fan, DRY.Maxi solenoid valve;
■ Read the values measured by the oven sensors such as door switch, core probe, temperature probes,
motor revolution sensor, etc.;
■ Control the flame control board BRAHMA ECM-113;
■ Control up to two blowers for the air-gas mixture;
■ Feed the 12 V DC loads of the oven such as control panel, LED bar light, etc.;
■ Communicate in CANBUS mode with the control board and accessory boards such as gas fumes
board, internet connection board and sous-vide board;
■ Communicate in MODBUS mode with UNOX complementary accessories such as proofer, hood,
holding cabinet and static oven;
■ Switch the phase polarity automatically. In case of the wrong polarity, without the relay for switching,
the flame control board would not detect the flame.
European gas unit power board
Gas power board sockets are summarized table 22
P10 P9 P8 P37 P29 P27 P38
P21 P30 P20 P19 P15 P14 P28 P11 P12 P13 P32 P18 P17 P16
24V
RI23
RI 3 RI 12 RI 14 RI 25 RI 24 RI 19 RI 16 RI 15 RI 18
RI 13
RI 5
RI 4
RI 6
RI 7
RI 26
P26
P5
P6
F9
P7
E1
F2 P1
F4
P2 P3 P4 P33 F3 P34 P35 P36 P25
F7
P22
HIGHT V
OL
TA
GE
LO
W V
OL
TA
GE
PE2021A0 - gas unit power board
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