Compressor Protection Module (Cpm); Electronic Expansion Valve (Exv) Board - Carrier AQUAFORCE 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

For a complete description of Main Base Board inputs and out-
puts and their channel identifications, see Table 3.
Compressor Protection Module (CPM) —
is one CPM per compressor. See Fig. 9. The device controls the
compressor contactors, oil solenoid, loading/unloading the
solenoid, motor cooling solenoid (30XA080,082 only) and the
oil separator heater. The CPM also monitors the compressor
motor temperature, high pressure switch, oil level switch, dis-
charge gas temperature, oil pressure transducer, motor current,
MTA (must trip amps) setting and economizer pressure trans-
ducer. The CPM responds to commands from the MBB (Main
Base Board) and sends the MBB the results of the channels it
monitors via the LEN (Local Equipment Network). The CPM
has three DIP switch input banks, Switch 1 (S1), Switch 2 (S2),
and Switch 3 (S3). The CPM board DIP switch (S1) configures
the board for the type of starter, the location and type of the
current transformers and contactor failure instructions. See Ta-
ble 4 for description of DIP switch 1 (S1) inputs. See Appendix
D for DIP switch settings.
The CPM board DIP switch S2 setting determines the must
trip amps (MTA) setting. See Appendix D for DIP switch set-
tings. The MTA setting which is calculated using the settings
S2 must match the MTA setting in the software or an MTA
alarm will be generated.
See below for CPM board DIP switch S3 address informa-
tion. See Table 5 for CPM inputs and outputs.
J10
221
TR1
J1A
MOV1
C41 C42
C32 C33
J2A
CH19 CH20 CH21
There
CCN J13 J9D
+ G -
221
CCN
D15
TR2 TR3 TR4 TR5
K1 K2
C43
RELAY
C34 C35
OUTPUTS
ANALOG
J2B J2C
INPUTS
J3
CH22 CH23 CH24 CH25 CH26
Fig. 8 — Main Base Board
CPM-A DIP Switch
Address:
CPM-B DIP Switch
Address:
CPM-C DIP Switch
Address:
NOTE: The CPM-A and CPM-B DIP switches are for all
units. The CPM-C DIP switches are for 30XA400-500 units.
Electronic Expansion Valve (EXV) Board —
The 30XA080,082 unit has one EXV board. The 30XA090-
500 units have one EXV board per circuit. See Fig. 10. The
board is responsible for monitoring the suction gas temperature
and economizer gas temperature thermistors. The board also
signals the main EXV and economizer EXV (ECEXV) motors
to open or close. The electronic expansion valve board
responds to commands from the MBB and sends the MBB the
results of the channels it monitors via the LEN (Local Equip-
ment Network). See below for DIP switch information. See
Tables 6 and 7 for EXV inputs and outputs.
EXV BOARD A
(080-500)
DIP SWITCH
Address:
EXV BOARD B
(090-500)
DIP SWITCH
Address:
EXV BOARD C
(400-500)
DIP SWITCH
Address:
LEN LEN
SIO
+ G – + G –
(LEN)
STATUS
J9B
J9C
195
195
195
195
195
J8 11
195
C16
J4
CH13 CH14 CH
CH10 CH11 CH12
15A
LOCATION OF
SERIAL NUMBER
9
1 2
OFF OFF OFF
1 2
OFF OFF ON
1 2
OFF OFF OFF
1 2 3 4 5 6
ON ON ON ON ON ON OFF ON
1 2 3 4 5 6
OFF ON ON ON ON ON OFF ON
1 2 3 4 5 6
ON OFF ON ON ON ON OFF ON
LEN
+ G –
J9A
DISCRETE
INPUTS
J5A
J5B J5C
CH + + CH + CH
15a C C 16a C 16b
CH17 CH18
a30-4255
3 4
OFF
3 4
OFF
3 4
ON
7 8
7 8
7 8