20. M2 Unit Controller Inputs and Outputs
Page 99
PRODIGYT M2 UNIT CONTROLLER
20. M2 Unit Controller Inputs and Outputs
When necessary, individual inputs and outputs may be read at the M2 board connectors. M2 boards are shown on wiring
diagrams as dashed boxes (see shaded areas in figure 40). Parts of the M2 boards will be located in all wiring diagram
sections (see Page 102 for connector information and description and type of input or output).
Example: To Determine If 24 Volts Is Being Supplied To The K3 Blower Contactor:
1. Using the unit wiring diagram, locate K3 and identify appropriate M2 board and jack/plug. (A55 Main Board and P265−4.)
2. Find the I&O table for P265−4 ; it shows a 24 volt output to the blower.
DESCRIPTION
KEY COMPONENT
A30
SENSOR, PRESSURE DISCHARGE AIR
A34
SENSOR, PRESSURE RETURN AIR
A55
PANEL, MAIN PANEL LENNOX
A59
PANEL, COMPRESSORS 3 AND 4
A96
CONTROL, INVERTER SUPPLY
A133
PANEL, GP BOARD LENNOX
A137
CONTROL, INVERTER RETURN
B1 COMPRESSOR 1
B2
COMPRESSOR 2
B3
MOTOR, BLOWER
B4
MOTOR, OUTDOOR FAN 1
B5
MOTOR, OUTDOOR FAN 2
B13 COMPRESSOR 3
B20 COMPRESSOR 4
B21
MOTOR, OUTDOOR FAN 3
B22
MOTOR, OUTDOOR FAN 4
B23
MOTOR, OUTDOOR FAN 5
B24
MOTOR, OUTDOOR FAN 6
B35
MOTOR, EXHAUST BLOWER 1
B36
MOTOR, EXHAUST BLOWER 2
CB8
CIRCUIT, BREAKER T1
CB10
CIRCUIT BREAKER, MAIN DISCONNECT UNIT
CB18
CIRCUIT, BREAKER T18
F10
FUSE, OUTDOOR FAN MOTOR
F30
FUSE, TRANSFORMER T29 PRIMARY
F31
FUSE, TRANSFORMER T29 SECONDARY
F37
FUSE, COMPRESSOR GROUP 1
F38
FUSE, COMPRESSOR GROUP 2
HR1 HEATER COMPRESSOR 1
HR2 HEATER COMPRESSOR 2
HR5 HEATER COMPRESSOR 3
HR11 HEATER COMPRESSOR 4
J11
JACK, GFI, RECEPTACLE
J86
JACK, OUTDOOR FAN INTERFACE
J87
JACK, OUTDOOR FAN INTERFACE 2
J118
JACK, COMPRESSOR 3 AND 4, CONTROL
J119
JACK, COMPRESSOR 3 AND 4, INPUT
J132
JACK, BLOWER , EXHAUST FAN MOTOR 1
J133
JACK, BLOWER , EXHAUST FAN MOTOR 2
J138
JACK, EXHAUST FAN 2
J139
JACK, EXHAUST FAN 3
J194
JACK, I/O FOR A133 LENNOX A133 BOARD
J211
JACK, INVERTER EXHAUST BLOWER
J248
JACK, VFD CONTROL
J258
JACK, VFD CONTROL EXHAUS AIR
J263
JACK, HIGH AND LOW PRESSURE SWITCHES
J264
JACK, BLOWER DECK
J265
JACK, CONTACTORS AND RELAYS
J267
JACK, OUTDOOR FAN AREA
J268
JACK, TRANSFORMER 1 POWER
J269
JACK, HUMIDITROL
J299
JACK, HUMIDITROL INTERFACE
K1,−1 CONTACTOR, COMPRESSOR 1
K2,−1 CONTACTOR, COMPRESSOR 2
K3, −1 CONTACTOR, BLOWER
K10,−1,2 RELAY, OUTDOOR FAN 1
K14,−1 CONTACTOR, COMPRESSOR 3
K68,−1 RELAY, OUTDOOR FAN 2
K146,1 CONTACTOR, COMPRESSOR 4
K149,−1 RELAY, OUTDOOR FAN 3
K150,−1 RELAY, OUTDOOR FAN 4
K152,−1 RELAY, OUTDOOR FAN 5
K153,−1,2 RELAY, OUTDOOR FAN 6
K199,−1 CONTACTOR, EXHAUST BLOWER 1
K201,−1 CONTACTOR, EXHAUST BLOWER 2
K202, −1 CONTACTOR, INVERTER BLOWER
K203, −2 RELAY, SUPPLY BLOWER AUX
K207, −2 RELAY, EXHAUST BLOWER AUX
L14
VALVE, SOLENOID REHEAT COIL 1
L30
VALVE, SOLENOID REHEAT COIL 2
P86
PLUG, OUTDOOR FAN INTERFACE
P87
PLUG, OUTDOOR FAN INTERFACE 2
P118
PLUG, COMPRESSOR 3 AND 4, CONTROL
P119
PLUG, COMPRESSOR 3 AND 4, INPUT
P194
PLUG, I/O FOR A133 LENNOX A133 BOARD
P211
PLUG, INVERTER EXHAUST BLOWER
P248
PLUG, VFD CONTROL
P258
PLUG, VFD CONTROL EXHAUS AIR
P263
PLUG, HIGH AND LOW PRESSURE SWITCHES
P264
PLUG, BLOWER DECK
P265
PLUG, CONTACTORS AND RELAYS
P267
PLUG,OUTDOOR FAN AREA
P268
PLUG, TRANFORMERS
P269
PLUG, HUMIDITROL
P299
PLUG, SAFETY
RT17
SENSOR, OUTDOOR AIR
S4
SWITCH, LIMIT HI PRESS COMPRESS 1
S7
SWITCH, LIMIT HI PRESS COMPRESS 2
S11
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP 1
S28
SWITCH, LIMIT HI PRESS COMPRESS 3
S37
SWITCH, PRESSURE EXHAUST FAN
S39
SWITCH, EXHAUST FAN
S42
SWITCH, OVERLOAD RELAY BLOWER MOTOR
S48
SWITCH, DISCONNECT
S49
SWITCH, FREEZE STAT COMPRESS 1
S50
SWITCH, FREEZE STAT COMPRESS 2
S53
SWITCH, FREEZE STAT COMPRESS 3
S84
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP 2
S85
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP 3
S87
SWITCH, LOW PRESS, COMP 1
S88
SWITCH, LOW PRESS, COMP 2
S94
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP 4
S95
SWITCH, FREEZE STAT COMPRESS 4
S96
SWITCH, LIMIT HI PRESS COMPRESS 4
S97
SWITCH, LOW PRESS, COMP 4
S98
SWITCH, LOW PRESS, COMP 3
S117
SWITCH, GFI
T1
TRANSFORMER, CONTROL
T18
TRANSFORMER, CONTACTOR
T29
TRANSFORMER, GFI
TB13
TERMINAL STRIP, POWER DISTRIBUTION
TB18
TERMINAL STRIP, CYCLE CONTROL
TB23
TERMINAL STRIP, BLOWER SPEED
TB24
TERMINAL STRIP, UNIT ADDER
TB40
TERMINAL STRIP, COMPRESSOR 1
TB41
TERMINAL STRIP, COMPRESSOR 2
TB47
TERMINAL STRIP, COMPRESSOR 3
TB58
TERMINAL STRIP, EXAUST FANS
TB59
TERMINAL STRIP, INVERTER BY−PASS
1 S42 USED ON M" VOLTAGE UNITS
AND UNITS WITH HIGH EFFICIENCY
MOTORS
2 ONLY ON UNITS WITH HUMIDITROL
OPTION
3 EXTERNAL HUMIDITROL CONTACTS
4 CONNECTS TO SECTION A" HEATING
DIAGRAM. MAY BE LOCATED IN
HEATING COMPARTMENT
5 S49 AND S50 ARE PART OF 5VDC CIR-
CUIT
6 F37 AND F38 ARE NOT USED ON
UNITS LESS ELECTRIC HEAT, 480
AND 600V
7 F37 AND S39 PRESSURE SWITCH
CONTROL
8 VOLTAGE CONTROL SINGLE STAGE
9 VOLTAGE CONTROL TWO STAGE
10 REMOVE JUMPER BETWEEN
TB24−28 AND TB24−29 WHENEVER
ALC CONTROL IS USED. REFER TO
SECTION C DIAGRAM
11 A30 SENSOR AND A96 INVERTER
CONTROL FOR B3 SUPPLY AIR
BLOWER
12 A34 SENSOR AND A137 INVERTER
CONTROL FOR B35 AND B36 EX-
HAUST AIR BLOWERS
13 A30 MAY BE USED WITH OR WITHOUT
A34
A34 MAY BE USED WITH OR WITHOUT
A30
A34 MAY BE USED WITH OR WITHOUT
B9 BYPASS DAMPER
A34 MAY BE USED WITH EITHER A96
VFD OR B9 BYPASS DAMPER
14 MITSUBISHI VFD
15 K202−1 CONTACTOR MAY BE
OMITTED ON UNITS WITH VFD OP-
ERATION ONLY
16 USED ON VFD APPLICATIONS
NOTE − IF ANY WIRE IN THIS APPLIANCE IS
REPLACED, IT MUST BE REPLACED WITH
WIRE OF LIKE SIZE, RATING, TERMINATION
AND INSULATION THICKNESS.
WARNING − ELECTRIC SHOCK HAZARD!
CAN CAUSE INJURY OR DEATH.
UNIT MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL AND LOCAL
CODES.
DISCONNECT ALL POWER BEFORE
SERVICING.
DENOTES OPTIONAL COMPONENTS
LINE VOLTAGE FIELD INSTALLED
Wiring Diagram Key (see figure 40)
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