Installation manual
8
ERQ125~250A7W1B
Inverter condensing unit
4PW51323-1C – 2018.04
8.1.
Internal wiring – Parts table
Refer to the wiring diagram sticker on the unit. The abbreviations
used are listed below:
A1P~A7P............. Printed circuit board
BS1~BS5 ............ Push button switch (mode, set, return, test, reset)
C1,C63,C66 ........ Capacitor
DS1,DS2 ............. Dip switch
E1HC~E3HC ....... Crankcase heater
F1U ..................... Fuse (650 V, 8 A, B) (A4P) (A8P)
F1U,F2U.............. Fuse (250 V, 3.15 A, T) (A1P)
F5U ..................... Field fuse
F400U ................. Fuse (250 V, 6.3 A, T) (A2P)
H1P~H8P ............ Pilot lamp (service monitor - orange)
H2P: Under preparation or in test operation when
blinking
H2P: Malfunction detection when light up
HAP..................... Pilot lamp (service monitor - green)
K1........................ Magnetic relay
K2........................ Magnetic contactor (MIC)
K2M,K3M ............ Magnetic contactor (M2C,M3C) (only for ERQ250)
K1R,K2R ............. Magnetic relay (K2M,K3M)
K3R~K5R ............ Magnetic relay (Y1S~Y3S)
K6R~K9R ............ Magnetic relay (E1HC~E3HC)
L1R...................... Reactor
M1C~M3C ........... Motor (compressor)
M1F,M2F ............. Motor (fan)
PS ....................... Switching power supply (A1P,A3P)
Q1DI.................... Earth leakage breaker (field supply)
Q1RP .................. Phase reversal detection circuit
R1T ..................... Thermistor (fin) (A2P)
R1T ..................... Thermistor (air) (A1P)
R2T ..................... Thermistor (suction)
R4T ..................... Thermistor (coil-deicer)
R5T ..................... Thermistor (coil-outlet)
R6T ..................... Thermistor (liquid-pipe receiver)
R7T ..................... Thermistor (accumulator)
R10...................... Resistor (current sensor) (A4P) (A8P)
R31T~R33T......... Thermistor (discharge) (M1C~M3C)
R50,R59 .............. Resistor
R95...................... Resistor (current limiting)
S1NPH ................ Pressure sensor (high)
S1NPL................. Pressure sensor (low)
S1PH,S3PH ........ Pressure switch (high)
SD1 ..................... Safety devices input
T1A...................... Current sensor (A6P,A7P)
V1R ..................... Power module (A4P,A8P)
V1R,V2R ............. Power module (A3P)
X1A,X4A.............. Connector (M1F,M2F)
X1M..................... Terminal strip (power supply)
X1M..................... Terminal strip (control) (A1P)
X1M..................... Terminal strip (A5P)
Y1E,Y2E.............. Expansion valve (electronic type) (main, subcool)
Y1S ..................... Solenoid valve (hotgas bypass)
Y2S ..................... Solenoid valve (oil return)
Y3S ..................... Solenoid valve (4 way valve)
Y4S ..................... Solenoid valve (injection)
Z1C~Z7C............. Noise filter (ferrite core)
Z1F...................... Noise filter (with surge absorber)
L1,L2,L3 .............. Live
N.......................... Neutral
............ Field wiring
............... Terminal strip
....................... Connector
...................... Terminal
....................... Protective earth (screw)
BLK...................... Black
BLU ..................... Blue
BRN..................... Brown
GRN .................... Green
GRY..................... Grey
ORG .................... Orange
PNK ..................... Pink
RED..................... Red
WHT .................... White
YLW..................... Yellow
8.2.
Optional parts cool/heat selector
S1S...................... Selector switch (fan, cool/heat)
S2S...................... Selector switch (cool/heat)
NOTE
This wiring diagram only applies to the outdoor
unit.
When using the option adaptor, refer to the
installation manual.
Refer to the installation manual, for connection
wiring to indoor-outdoor transmission F1-F2, and
on how to use BS1~BS5 and DS1, DS2 switch.
Do not operate the unit by short-circuiting
protection device S1PH.
NOTE
Use copper conductors only.
For connection wiring to the central remote
controller, refer to the installation manual of the
central remote controller.
Use insulated wire for the power cord.
4PWEN51323-1C_2018_04.book Page 8 Thursday, May 31, 2018 9:12 PM
