101
8. Sequential Control For Cool Mode
The starting sequence for indoor fan, outdoor fan and compressors is shown as below:
2 seconds
Start
Indoor fan
15 seconds
2 seconds
outdoor fan 1
compressor 1*
15 seconds
2 seconds
outdoor fan 2
compressor 2*
15 seconds
2 seconds
outdoor fan 3
compressor 3*
15 seconds
2 seconds
outdoor fan 4
compressor 4*
* if available and applicable
The compressors will be turned on one by one depending on the on/off conditions shown in the above
9. Sequential control for heat mode
The starting sequence for indoor fan, outdoor fan and compressors is as shown below :
2 seconds
2 seconds
Start
Indoor fan
all 4 way valves
15 seconds
2 seconds
outdoor fan 1
compressor 1*
15 seconds
2 seconds
outdoor fan 2
compressor 2*
15 seconds
2 seconds
outdoor fan 3
compressor 3*
15 seconds
2 seconds
15 seconds
15 seconds
outdoor fan 4
compressor 4*
Heater 1*
Heater 2*
* if available and applicable
The compressors will be turned on one by one depending on the on/off conditions shown in the above.
Troubleshooting
When any air conditioner malfunction is noted, immediately switch off the power supply to the unit and
contact the local dealer, if necessary. Some simple trouble shooting tips are given below :
Trouble
Probable Cause
Suggested Action
1. Fan does not work
1. No power supply
2. Fan capacitor faulty
3. Fan motor faulty
4. Switch faulty
1. Check power supply
2. Contact local dealer
3. Contact local dealer
4. Change switch
2. Fan works, but
compressor does
not work
1. Thermostat setting too high
2. Dual pressure control trip
3. Compressor faulty
4. Compressor contactor faulty
1. Reset thermostat
2. Reset Pressure Control
3. Contact local dealer
4. Contact local dealer
3. Both fan and
compressor does
not work
1. Power failure
2. Starter trip
3. Fuse blown in power switch or operating
unit
1. Operate when power supply resume
2. Reset starter
3. Check and replace fuse
4. Air-conditioner
works but cooling
not satisfactory
1. Thermostat setting too high
2. Doors and/or windows not closed
3. Condenser coil dirty
4. Some objects blocking the inlet and/or
outlet of the unit
5. Insufficient refrigerant charge.
1. Reset thermostat
2. Close doors and/or windows
3. Contact local dealer
4. Remove the object
5. Contact local dealer
Содержание MDB075B
Страница 1: ...MDB 2004 Ducted Split Systems Models MDB 075 750B MDB 125 150C MDB 075 500BR MDB 125CR...
Страница 38: ...37 Blower Performance Curves MDB 075B BLOWER PERFORMANCE CURVE...
Страница 39: ...38 MDB 100B BLOWER PERFORMANCE CURVE...
Страница 40: ...39 MDB 125B BLOWER PERFORMANCE CURVE...
Страница 41: ...40 MDB 125C BLOWER PERFORMANCE CURVE...
Страница 42: ...41 MDB 150B BLOWER PERFORMANCE CURVE...
Страница 43: ...42 MDB 150C BLOWER PERFORMANCE CURVE...
Страница 44: ...43 MDB 200B BLOWER PERFORMANCE CURVE...
Страница 45: ...44 MDB 250B BLOWER PERFORMANCE CURVE...
Страница 46: ...45 MDB 300B BLOWER PERFORMANCE CURVE L s...
Страница 47: ...46 MDB 350B BLOWER PERFORMANCE CURVE...
Страница 48: ...47 MDB 400B BLOWER PERFORMANCE CURVE...
Страница 49: ...48 MDB 450B BLOWER PERFORMANCE CURVE...
Страница 50: ...49 MDB 500B BLOWER PERFORMANCE CURVE...
Страница 51: ...50 MDB 600B BLOWER PERFORMANCE CURVE...
Страница 52: ...51 MDB 750B BLOWER PERFORMANCE CURVE...
Страница 53: ...52 Outlines And Dimensions Indoor MODEL MDB 075 100 B BR MODEL MDB 125C HORIZONTAL AIR DISCHARGE ONLY...
Страница 60: ...59 MODEL MMC 075C CR MODEL MMC 100C...
Страница 61: ...60 MODEL MMC 125BR 150C STANDARD VERTICAL DISCHARGE NON CONVERTIBLE...
Страница 69: ...68 MODEL INDOOR MDB 400B4 MDB 500B4 WITH SEQUENTIAL CONTROLLER OUTDOOR MMC 100B x 4 MMC 125B x 4...
Страница 70: ...69 MODEL INDOOR MDB 600B4 WITH SEQUENTIAL CONTROLLER OUTDOOR MMC 150C x 4...
Страница 71: ...70 MODEL INDOOR MDB 750B5 WITH MAGNETIC CONTACTOR OUTDOOR MMC 150C x 5 INDOOR AUXILLARY C1 C1...
Страница 72: ...71 Wiring Diagrams Heatpump INDOOR EXPORT MODEL MDB 075 100BR C3 0B MODEL MDB 125CR EXPORT...
Страница 73: ...72 MODEL MDB 150 200 250 BR2 EXPORT MODEL MDB 300 350 BR3 EXPORT...
Страница 74: ...73 MODEL MDB 400 500 BR4 EXPORT...
Страница 84: ...83 Refrigerant Circuit Diagram MODEL MMC 075C 100C...
Страница 85: ...84 MODEL MMC 075B 100B 125B 150C...
Страница 86: ...85 MODEL MMC 075CR WITH CAPILLARY TUBE EXPANSION SPECIFICATION...
Страница 87: ...86 MODEL MMC 100BR 125BR WITH CAPILLARY TUBE EXPANSION SPECIFICATION...
Страница 88: ...87 MODEL MMC 075CR WITH THERMAL EXPANSION VALVE SPECIFICATION...
Страница 89: ...88 MODEL MMC 100BR 125BR WITH THERMAL EXPANSION VALVE SPECIFICATION...
Страница 101: ...100 SEQUENTIAL CONTROLLER BLOCK DIAGRAM...
Страница 163: ...2004 McQuay International 1 800 432 1342 www mcquay com ISO 9002 REGISTERED...