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4

. FUNCTION

4

-1. Room Temperature Control

Cooling

Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.

The room temperature (and other information) is transmitted every 5 minutes by the remote control unit to the
controller in the indoor unit.

The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 
3 minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.

As a protective measure, the control circuit switches the compressor OFF 

not before than

 5 minutes

of compressor 

operation.

Thermo. ON : When the room temperature is above T + 1°C (T°C is set temperature).

Compressor

ON

Thermo. OFF : When the room temperature is equal to or below set temperature T°C.

Compressor

OFF

3 minutes

5 minutes

ON

OFF

ON

OFF

ON

OFF

Compressor

ON

OFF

ON

OFF

ON

OFF

More than

5 minutes

Outdoor fan

Indoor fan

Set speed

T+1

°

C

T

°

C

set temp.

Thermo.
OFF

Thermo.
OFF

Thermo.
ON

Thermo.
OFF

Thermo.
ON

Thermo.
ON

Thermo.
ON

Room temp.

5 minutes

5 minutes

5 minutes

5 minutes

5 minutes

5 minutes

5 minutes

Signal from remote control unit

3 seconds

3 seconds

3 seconds

3 seconds

11

Содержание 387106936

Страница 1: ...TECHNICAL DATA SERVICE MANUAL INDOOR UNIT CAV92C5TA CAV122C5TA SPLIT SYSTEM AIR CONDITIONER CAV122C5TA 387106937 0 8180 254 0 05 2002 Model No Product Code No CAV92C5TA 387106936...

Страница 2: ...w wiring to touch the refrigerant tubing compressor or any moving parts of the fan Do not use multi core cable when wiring the power supply and control lines Use separate cables for each type of line...

Страница 3: ...p and Float Switch 13 5 TROUBLESHOOTING 14 5 1 Check before and after troubleshooting 14 5 2 Air conditioner does not operate 14 5 3 Some part of air conditioner does not operate 18 5 4 Air conditione...

Страница 4: ...ons Unit Height mm Width mm Depth mm Ceiling panel Height mm Width mm Depth mm Package dimensions Unit Height mm Width mm Depth mm Volume m3 Ceiling panel Height mm Width mm Depth mm Volume m3 Weight...

Страница 5: ...idth mm Depth mm Ceiling panel Height mm Width mm Depth mm Package dimensions Unit Height mm Width mm Depth mm Volume m3 Ceiling panel Height mm Width mm Depth mm Volume m3 Weight Unit Net kg Shipping...

Страница 6: ...devices Type Operating temp Open C Close C Run capacitor F VAC Flap Motor Type Model Rating No of poles rpm Nominal output W Coil resistance Ambient temp 20 C k Heat Exch Coil Coil Rows Fin pitch mm...

Страница 7: ...e Operating temp Open C Close C Run capacitor F VAC Flap Motor Type Model Rating No of poles rpm Nominal output W Coil resistance Ambient temp 20 C k Heat Exch Coil Coil Rows Fin pitch mm face area m2...

Страница 8: ...r TH1 Resistance Thermistor Room sensor TH2 Resistance Drain pump Model Rating Voltage Input Total head capacity Safety float switch Model Contact rating BI 1300 2725 230V AC DC 0 5A PC 309564003 220...

Страница 9: ...2 DIMENSIONAL DATA 9...

Страница 10: ...3 ELECTRICAL DATA 3 1 Electric Wiring Diagrams 10...

Страница 11: ...trol circuit has a built in automatic time delay to allow the internal pressure to equalize As a protective measure the control circuit switches the compressor OFF not before than 5 minutes of compres...

Страница 12: ...oor fan Continuous operation L low speed LL very low speed intermittent ventilation only while the compressor is ON Dry B zone Compressor FMI indoor fan Intermittent operation ON for 3 minutes and OFF...

Страница 13: ...rain Pump OFF Float Switch NOTE Either in Heating or another mode or the unit is stopped when the float switch is turned ON the drain pump operates for 20 minutes minimum OFF OFF OFF OFF OFF OFF ON ON...

Страница 14: ...nect power or turn off circuit breaker before you start checking or servicing 5 2 Air conditioner does not operate 5 2 1 Circuit breaker trips or fuse blows A When the circuit breaker is set to ON it...

Страница 15: ...is set in ON position Set OPERATION selector switch to ON Indoor PCB Ass y is defective NO Check power supply Power is being supplied to the indoor unit Circuit breaker is tripped Power failure Reset...

Страница 16: ...sure resistance of primary and secondary winding of transformer TR Indoor PCB Ass y is defective OK Measure resistance of indoor and outdoor fan motor winding FM Measure resistance of compressor motor...

Страница 17: ...unit does not run Indoor PCB Ass y is defective OK NO Is room temperature too low Try to lower setting temperature by temperature setting button button Outdoor unit still does not run Remote control...

Страница 18: ...matter in bearings Remove foreign matter or repair Repair or replace Measure resistance of outdoor fan motor winding Check fan motor capacitor Measure resistance of flap motor winding Fan cannot be t...

Страница 19: ...otor winding is abnormally high Refrigerant gas shortage Charge refrigerant gas Measure power supply voltage Rotor may be locked up The voltage is too low 5 3 5 Compressor and outdoor fan do not run F...

Страница 20: ...ion of remote control unit Cool air from air conditioner reaches position directly Change position of remote control unit Wide and narrow tubes between indoor unit and outdoor unit are insulated Insul...

Страница 21: ...will blink when either indoor coil thermistor or room air thermistor is defective At the same time the outdoor unit will stop Indoor unit will operate only for ventilation NOTE Operation lamp on fron...

Страница 22: ...sure the resistance by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check 6 1 4 Measurement of Insulation Resistance...

Страница 23: ...n place a probe on the capacitor terminals as shown in Fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the maximum value The capacitor is good i...

Страница 24: ...s on the PCB of each indoor unit with the switch positions of its remote control unit To change address on PCB 1 Set the switch n 2 to off position on the address dip switch S01 see detail on figure T...

Страница 25: ...T l 04 74 00 92 92 Fax 04 74 00 42 00 R C S Bourg en Bresse B 759 200 728 R D 28 Reyrieux BP 131 01601 Tr voux CEDEX France...

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