Panasonic CU-2TZ41TBE - Troubleshooting; Common Symptoms and Causes

19
7. Wiring Connection Diagram
TO INDOOR
UNIT B
1 2 3
TO INDOOR
UNIT A
SINGLE PHASE POWER SUPPLY
1
TERMINAL BOARD TERMINAL BOARD
TERMINAL BOARD
PARTICULAR PLATE
L N
2 3
YELLOW (YEL)
(TRADEMARK)
COMP. TERMINAL
THE PARENTHESIZED LETTER IS INDICATED ON TERMINAL COVER
BLUE (BLU)
RED (RED)
REMARKS: B : BLUE BL : BLACK W : WHITE R : RED Y : YELLOW GRY : GRAY G : GREEN ORG : ORANGE Y/G : YELLOW/GREEN BR: BROWN
ELECTRONIC CONTROLLER
(NOISE FILTER)
AC-WHT2
(WHITE)
AC-BLK2
(BLACK)
R B Y
R
B Y
U
V W
U
V
W
P
N
(RED) (BLUE)
(YELLOW)
CONNECTOR WHITE
COMPRESSOR
Q23
1 6
CN-DATA
(WHITE)
CN-DATA1
(WHITE)
6
1
BL
W
CN-BLK
(BLACK)
CN-WHT
(WHITE)
AC-WHT
BL W
(WHITE) AC-BLK (BLACK) DATA1 (RED) DATA2 (BROWN)
FG1
(GREEN)
FG2 (GREEN)
FUSE 3 (25A 250V)
NOISE FILTER
CIRCUIT
COMMUNICATION
CIRCUIT
CN-PSW
(WHITE)
R R
GRY
GRY
RAT2 (GRAY)
RAT1 (GRAY)
REACTOR
FUSE 2
(T3.15A L250V)
W W W W W W
ELECTRONIC CONTROLLER
(MAIN)
FUSE 1 (T3.15A L250V)
MS
3~
1 2
CN-TH1
(WHITE)
CN-FM1
(WHITE)
7
4
1
CN-TH3
(WHITE)
CN-TH4
(RED)
CN-TH2
(BLUE)
CN-DEMAND
(WHITE)
RECTIFICATION
CIRCUIT
SWITCHING
POWER SUPPLY
CIRCUIT
4 1
AIR TEMP. SENSOR (THERMISTOR)
・
CONNECTOR WHITE (HEAT ONLY)
HEAT EXCHANGER TEMP. SENSOR (THERMISTOR)
3 1
DEFROST TEMP. SENSOR (THERMISTOR)
5 1
HIGH PRESSURE SW.
LIQUID PIPE TEMP. SENSO
R
(UNIT A) (THERMISTOR) LIQUID PIPE TEMP. SENSO
R
(UNIT B) (THERMISTOR)
4 1
GAS PIPE TEMP. SENSOR (UNIT A) (THERMISTOR)
GAS PIPE TEMP. SENSOR (UNIT B) (THERMISTOR)
1
3
t
FAN MOTOR
t
t t
WHT
WHT WHT
t t
M
R
BL
W
B Y
t t
ELECTRO MAGNETIC COIL (4-WAY VALVE)
CRANKCASE HEATER
・UNIT A ELECTRO-
・MAGNETIC COIL
(EXPANSION VALVE)
・
UNIT B ELECTRO-
・MAGNETIC COIL
(EXPANSION VALVE)
TANK TEMP. SENSOR (THERMISTOR)
CN-HOT
(WHITE)
CN-EV2
(YELLOW)
CN-EV1
(WHITE)
CN-TANK
(WHITE)
HT1 (ORANGE) HT2 (ORANGE)
1
3
1
6
1
6
1
3
CONNECTOR YELLOW
ORG ORG
FUSE 5
(20A 250V)
FUSE 4
(20A 250V)
BL
W
BL
W
R
BR
Y/G
GG
M M
Resistance of Compressor Windings
CONNECTION
U - V
U - W
V - W
1.897 1.907 1.882
9RD132XFA21 (Ω)
RECTIFICATION
CIRCUIT
PFC
CIRCUIT