Specifications

Symbol Name Symbol Name Symbol Name

MC Compressor motor CR1,2 Surge killer CH Crankcase heater

MF1 Fan motor (indoor) 63H High-pressure switch T1,2 Timer (defrost)

MF2 Fan motor (outdoor) FZ Auxiliary relay (fan) 21S4 4-way valve

52C Contactor (compressor) CZ Auxiliary relay (compressor) C03,04,05,11-15 Connector

52F Contactor (fan I/D) 30CZ,FZ Auxiliary relay (check) X1 Contactor (fan O/D)

TB1~3 Terminal block <SW1> Switch (Operation mode) X2 Auxiliary relay (defrost)

F1, F2 Fuse (3.15A) <SW2> Switch (on) 26D Thermostat (defrost)

Tr Transformer <23WA> Thermostat (room temp.) HZ Auxiliary relay (4-way valve)

51C Over current relay (compressor) 49F Internal protector (fan O/D) SV Solenoid valve

51F1,2 Over current relay (fan I/D,O/D) 49C Internal thermostat compressor

Note : 1. The dotted lines show field wiring

2. The figure in the parentheses show field supply parts.

3. Color of earth wire is yellow and green twisting.

4. If the power supply is 380AV, change the “C03”

connector with silver color tape to red color tape

5. Refer below example about wiring mark

Controller connection.

Symbol No. Function

PAC-204RC

terminal no.

1 Power (Active) 24VAC(L)

3 Cooling or heating operation COMP1

4 Reversing valve for heating operation 4WV

5 Fan operation FAN HI

TB2

6 Power (Neutral) 24VAC(N)

Caution,

1. To protect each Fan motor and Compressor from abnormal

current, Over current relays <51C>, <51F1,2> are installed.

Therefore, do not change factory set value of Over current

relays.

2. Do not change factory set value of all timers.

MRT080AR

MRT100AR

(STANDARD

: MECHANICAL

CONTROL)

MRT080AR

MRT100AR