-15-
IV. CONTROL ARCHITECTURE
IV. c -
UC & UL (UNDERCOUNTER) HORIZONTAL CONTROLLER:
Parts assembly for MIT control version only
HOLDER CLIP
337-60038-00
(set of two)
CONTROL HEAD
UC/UL 337-60321-00
HORN
337-60070-00
CABINET SENSOR - 337-60069-02
COIL SENSOR - 337-60071-02
DISCHARGE SENSOR - 337-60072-00
TO TRANSFORMER
(not included for MIT II versions)
CONTROL CABLE
333-60228-00
RELAY BOX
337-60172-02
ADAPTER HARNESS
HT = 333-60240-00
LT = 333-60225-00
UNUSED
EVAP BLOWER RELAY
(power line in 1)
TO COMPRESSOR
& DEFROST RELAY
(power line in 2)
6 Door Switch
5 Door Switch
4 Door Heater
3 Blower
2 Line Voltage
1 Defrost
337-60172-02
2 Compressor
1 Line Voltage
DC 12-2001
MIT CONTROL TROUBLE SHOOTING DIAGRAM
Date code will be listed
as the week-year (01-52)-
(2001-2100) when the
control is manufactured.
PIN connections may
not be available for
all model types.
Part numbers may
vary according to
model type.
Revision Level
Remove the 4 screws (one
in each corner) & remove
the relay box cover to
expose pin connections &
transformer with voltage
setting jumper.
NOTE
All pins in this connection should
not read more than 20 VAC
Connector
Pin No. Color Signal
1Gray Blower*
2 Orange Door Heater*
3 Green Alarm From Controller
4Black Return From Horn
5
6
7White/Purple -RS485
8Black Ground
9White 12 VAC
10 Blue Compressor*
11 Purple Defrost*
12 Yellow Door Open Signal
13 Red Power to Horn
14
15
16 Pink +RS485
17 Red 12 VDC to Controller
18 Black 12 VAC
*Voltage should not be more than 5 DC when
measured to ground (pin 8).
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