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4 0 | Bosch IDS BOVB 18
16 Wiring Diagrams
16.1 BOVB36-18 (3 ton)
OUTDOOR UNIT WIRING DIAGRAM
OUTDOOR UNIT WIRING DIAGRAM
Y/G
FAN
FAN
W
V
U
Y/G
COMP.
COMP.
Terminal block
Power in
Power in
USE COPPER
CONDUCTORS ONLY
Switch OFF Position:
Switch ON Position:
ON
Color upper half to show
Color lower half to show
switch position is UP.
switch position is DOWN.
1
1
OFF
*
The factory Default
ON
ON
ON
*
*
*
OFF
OFF
OFF
For 36K model
J2 J2
For 24K model
Unused
ON
SW4-1
OFF
Must be set at OFF position
ON
Unused
SW4-2
Must be set at OFF position
OFF
Adaptive capacity output disable
ON
SW4-3
Adaptive capacity output enable
OFF
Accelerated cooling/heating
ON
SW4-4
*
Normally cooling/heating
OFF
ON
Operating time is reduced 10%
SW5-1
*
Enter defrost
OFF
Normal
ON
Defrosting extended for 60 seconds
SW5-2
Quit defrost OFF
*
Normal
Figure 65
Data subject to change
ORANGE
SC
BROWN
CN3
TEST POINTS
SW4
SW5
J2
CN22
ON
ON
ON
N P
H
1 2 3 4
1 2
L
COM
DSP1
IPM
IPM
GRAY/W
W
BROWN/V
V
U
BLACK/U
CONTROL BOARD
CONTROL BOARD
TF
E4
E3
RED
CN1 L1
CN2 L2
BLACK
GND1
GND2
ORANGE
Y/G
Y/G
Y/G
P
P
R
R
E
E
S
S
S
S
*
Check the system parameters
CHECK
s 1s 1
PRESS
Unused
6s
Forced cooling/heating
PRESS
FORCE
(Charge mode)
1s
PRESS
Forced defrosting
6s
*
ON
Comp. running
*
LED2
LED1
IPM Module Fault
ON
FLASH
GREEN
*
LED2
Standby
OFF
ON
Fault
LED2
OFF
No fault
RED
ON
Power on
LED3
OFF
Power off
GREEN
CN31
USB
CHECK
FORCE
1
HPS
CN10
CN25
CN13
CN11
CN14
CN16
BLACK
WHITE
CN7
BLUE
RESERVE
CN9
CN12
RV
RV
C B Y W
C B Y W
Thermostat
Connections
BLUE
PEV
PEV
CCH
CCH
Note:
1. B terminal to be connected with
thermostat (O/B) wiring. Reversing
valve energizes in heating.
2. B and W wiring only needed in heat pump systems
HPS
High pressure switch
T5
Comp. discharge temp. sensor
PT
Pressure sensor
T3
Condensor temp. sensor
T4
Ambient temp. sensor
EEV
Electric expansive valve
RV
Reversing valve
PEV
Pressure equalizer valve
CCH
Crankcase heater
COMP. Compressor
TEMP. Temperature
SC
Starting capacitor
TF
Control board module temperature
Installation Instructions
WARNING
ELECTRIC HAZARD 380 VOLTS DC
ELECTRIC HAZARD 380 VOLTS DC
WAIT 3 MINUTES AFTER DISCONNECTING POWER,THEN
VERIFY DC VOLTAGE LESS THAN 42 VDC AT INVERTER
TEST POINTS P-N.
TEST POINTS P-N. COMPONENTS MAY STORE A
DANGEROUS ELECTRICAL POTENTIAL OF 380 VOLTS DC.
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PERSONAL INJURY OR DEATH
CODE
Fault description
C3
T h e c o i l s e n s o r i s s e a t e d f a u l t i n c o o l i n g ( T 3 )
E4
Temperature sensor fault (T3,T4,T5)
E5
High/Low voltage protection
E7
Compressor discharge sensor is seated fault (T5)
E9
EEPROM fault
F1
High pressure switch fault (HPS)
H0
Communication fault in main control chip
H5
5 times (P2) protection in 100 minutes,lockout
EEV
H8
Pressure transducer fault (PT)
L0-L9
The IPM module protection(only for analysis)
P0
High module radiator temperature protection (TF)
P1
High pressure(HPS) protection
P2
Low pressure protection in cooling or heating (PT)
T5
P3
Compressor over current protection
P4
High T5 protection
PT
P5
Condensor coil temperature protection in cooling (T3)
T3
PH
Low discharge superheat protection
T4
AtL
Ambient temperature limited T4 (heat pump)
CODE
Description
Forced operation mode
┣
L
Running indication under T3 limited condition
d
Running indication under T5 limited condition
P
Compression ratio protection limit
F
Running indication under TF limited condition
C
Running indication under current limited condition
U
Running indication under low voltage limited condition
A
Running indication under return oil model
dF
Running indication under defrost model
Number
Point check content
0
Outdoor unit c apac ity ,ex ample:H3=Heat pump 3 ton
1
O utdoor unit mode:0-s tandby ,2-c ooling,3-heating
2
O utdoor unit s et c ompres s or s peed(Hz)
3
T 3:outdoor c oil temp.(°F)
4
T4:outdoor ambient temp.(°F)
5
T5:compressor discharge temp.(°F)
6
/
7
/
8
T f:module temp.(°F)
9
Pe:evaporating pressure(PSI)
10
Pc:condensing pressure(PSI)
11
Tes target ev aporating temp.(only for c ooling mode)(°F)
12
Te:ev aporating temp.(°F)
13
Tc s target c ondens ing temp(only for heating mode)(°F)
14
Tc :c ondens ing temp.(°F)
Target of the c ompres s or dis c harge s uperheat
15
(heating mode only ) (°F)
16
Compressor diacharge superheat(°F)
17
Opening of EEV
18
Outdoor fan speed
19
Compres s or c urrent(A)
20
Power AC voltage Input(V)
21
Compressor input DC voltage (V)
22
Continuous running time of the compressor(min)
23
Last fault code
24
Software version
25
Remar k "- - "
10.2020 | Bosch Thermotechnology Corp.
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