Service Section Technical Training

Sequential Controller SQ 1.0

Features Control & Balance Loading up to 4 compressorsControl & Balance Loading up to 4 compressors Selectable Stage Differential Temperature SettingSelectable Stage Differential Temperature Setting Self Diagnostic FunctionSelf Diagnostic Function Anti-Freeze ProtectionAnti-Freeze Protection Memory Backup-Auto Random RestartMemory Backup-Auto Random Restart Wired LCD Control PanelWired LCD Control Panel 7 Days Programmable Timer7 Days Programmable Timer 2 Stages Heater With On/Off Control2 Stages Heater With On/Off Control

Models Available Cooling : SQC2; SQC3; SQC4Cooling : SQC2; SQC3; SQC4 Heat Pump : SQH22; SQH32; SQH42Heat Pump : SQH22; SQH32; SQH42 Heater : SQHT22; SQHT32; SQHT42Heater : SQHT22; SQHT32; SQHT42 Sequential Controller SQ C 2 Sequential Control Cooling No. of Comp SQ H 2 2 Sequential Control Heatpump No. of Comp No. of Heater

Sequential Controller Package of Sequential Controller: SQ Main Board SQ Main Board Display Panel (Optional) Display Panel (Optional) SQ LCD Panel SQ LCD Panel Display Panel SQ Main Board SQ LCD Panel

Sequential Controller Package of Sequential Controller: SQ Main Board SQ Main Board SQ LCD Panel SQ LCD Panel SQ Main Board SQ LCD Panel

SQ Main Board Located in the indoor unit Located in the indoor unit Signal to compressors, indoor/outdoor fan, valve & auxiliary heater with timer and protection Signal to compressors, indoor/outdoor fan, valve & auxiliary heater with timer and protection Compressor relay cut off - H/L trip Compressor relay cut off - H/L trip Manual reset button Manual reset button

Display Panel Located in switch board Located in switch board Separated into 2 boards, Separated into 2 boards, (1) Control Board (2) Display Board (2) Display Board

Consist of connectors to wire live signal for Consist of connectors to wire live signal for a. Compressor trip x 4 b. Compressor run x 4 c. CC heater x 4 d. Neutral e. Connecting to Display Board Control Board Display Panel

Display Board Display 8 LEDs for 4 compressors and CC heaters Display 8 LEDs for 4 compressors and CC heaters On/Off button to turn unit on/off On/Off button to turn unit on/off Display Panel

SQ LCD Panel Mode of operation Mode of operation Timer Timer Set temperature/room temperature Set temperature/room temperature Compressor on status Compressor on status Error code Error code

Model Configuration ConfigurationR42 value Heatpump 2 comp1k Heatpump 3 comp3.3k Heatpump 4 comp9.1k Cooling / Heater 2 comp20k Cooling / Heater 3 comp47k Cooling / Heater 4 compOpen

Dip Switch Setting 1 & 2 No. of Heater 3 & 4 Stage Differential Temperature 5 Auto Mode Selection 5 Auto Mode Selection 6 Hot Keep Option 6 Hot Keep Option 7 & 8Defrost Option Dip SW Configuration

Mode Selection SW1(dip1)SW2(dip2)SW5(dip5) 1.Cooling(SQCn)offoffoff 2.H/pump+no heater(SQHn0)onoffoff 3.H/pump+1 heater(SQHn1)offonoff 4.H/pump+2 heater(SQHn2)ononoff 5.Auto H/pump+no heater(SQHn0)onoffon 6.Auto H/pump+1 heater(SQHn1)offonon 7.Auto H/pump+2 heater(SQHn2)ononon Note: n denotes nos. of compressor(s) where the postfix numbers indicates Nos. of compressor(s).

Operating Modes ModelAutoCoolHeatFan SQCn-x-x SQHnh- x xx(SW5=off) SQHnhxxxx(SW5=on) SQHTnh- x xx(SW5=off) SQHTnhxxxx(SW5=on) x~modes available n~numbers of compressor(s) h~numbers of heater(s)

2 sec Sequence Control Cooling Mode Start Indoor Fan Outdoor Fan 1 Outdoor Fan 2 Outdoor Fan 3 Outdoor Fan 4 Compressor 1 Compressor 2 Compressor 3 Compressor 4 15 sec 2 sec

Sequence Control Heating Mode 2 sec Start Indoor Fan Outdoor Fan 1 Outdoor Fan 2 Outdoor Fan 3 Outdoor Fan 4 Compressor 1 Compressor 2 Compressor 3 Compressor 4 15 sec 2 sec All 4 way valves 2 sec Heater 1 15 sec Heater 2 15 sec

Stage Differential Temperature SW3(dip3)SW4(dip4) Conoff Coffon Conon 4. Defaultoffoff Note : 1.5°C only valid for 2 and 3 compressors model. For 4 compressors, max 1.0°C For 4 compressors, max 1.0°C

Stage Differential Temperature Default Setting ModelDiff. Temp. setting 1 compressorNot applicable 2 compressors1.5°C 3 compressors1.0°C 4 compressors0.5°C

Stage Differential Temperature T room °C T s +1.5 T s +1.0 T s +0.5 TsTs T s -0.5 T s comp on 2 comp on 3 comp on 4 comp on All comp off 3 comp off2 comp off 1 comp off 0.5°C 0.5°C Differential Temperature Cooling Cycle

1.0°C Differential Temperature Cooling Cycle Stage Differential Temperature T s +3.0 T s +2.0 T s +1.0 TsTs T s comp on 2 comp on 3 comp on 4 comp on All comp off 3 comp off 2 comp off 1 comp off 1.0°C T room °C

Stage Differential Temperature Cooling Cycle 1.5°C Differential Temperature T s +3.0 T s +2.0 T s +1.5 TsTs T s comp on 2 comp on 3 comp on All comp off 2 comp off 1 comp off 1.0°C T room °C T s +0.5

Stage Differential Temperature Heating Cycle T s +1.5 T s comp on 2 comp on 3 comp on 4 comp on 4 comp off 3 comp off 2 comp off 1 comp off 1.0°C T s -0.5 TsTs 0.5°C Differential Temperature T s +1.0 T room °C T s -1.0

Stage Differential Temperature Heating Cycle T s +1.5 T s +0.5 T s comp on 2 comp on 3 comp on 4 comp on 4 comp off 3 comp off 2 comp off 1 comp off 1.0°C T s -1.5 T s -0.5 TsTs 1.0°C Differential Temperature T room °C

Stage Differential Temperature Heating Cycle T s +1.5 T s +0.5 T s comp on 2 comp on 3 comp on 3 comp off 2 comp off 1 comp off 1.0°C T s -1.5 T s -1.0 TsTs 1.5°C Differential Temperature T room °C

Hot KeepSW6(dip6) 1. Fan offoff 2. Fan onon Factory preset: SW6 = off (Fan off)

Hot Keep 1) Hot Start When at least 1 Compressor cuts in If Any of the indoor coil temp >= 30°C, indoor fan will run If Any of the indoor coil temp >= 30°C, indoor fan will run If All indoor coil temp <= 15°C, indoor fan will stop If All indoor coil temp <= 15°C, indoor fan will stop Fan On Option When auxiliary heater is running, indoor fan always run

Hot Keep 2) Hot Keep When Compressor cut out or not running If Any of the indoor coil temp >= 40°C, indoor fan will run If Any of the indoor coil temp >= 40°C, indoor fan will run If All indoor coil temp <= 15°C, indoor fan will stop If All indoor coil temp <= 15°C, indoor fan will stop Fan On Option When all compressors cut off, indoor fan will STOP When all compressors cut off, indoor fan will STOP Fan Off Option

01/212 Hours oCoCoCoC Defrost Mode if >5 min The likelihood of ice frosting: Defrost

SW7(dip7) SW7(dip7) 1. Derivative Defrost offoff 2. Derivative Defrost onon Factory preset: SW7 = off Derivative Defrost Option

Defrost Derivative Defrost Option As an add on condition with conventional defrost condition. As an add on condition with conventional defrost condition. Only when this two conditions are met the compressor can enter defrost mode. Only when this two conditions are met the compressor can enter defrost mode. The indoor and room temperature is monitor after 5 minutes compressor running. The indoor and room temperature is monitor after 5 minutes compressor running. dT = T room - T incoil Condition for frosting: Condition for frosting: dT / dT max <= 85% dT max is reset when defrost operation terminated

Defrost SW8(dip8) SW8(dip8) 1. Compressor offoff 2. Compressor onon Factory preset: SW8 = off Defrost Cycle Option

Defrost Defrost Cycle Option Pre Defrost Cycle One compressor will turn on for 2 mins before the specific compressor enters defrost cycle One compressor will turn on for 2 mins before the specific compressor enters defrost cycle Defrost Cycle (A)Compressor On Option Outdoor Fan & 4 WV Off Outdoor Fan & 4 WV Off Compressor On Compressor On

Defrost Defrost Cycle Option Defrost Cycle (B) Compressor Off Option COMP OD fan ON OFF ON OFF 4WV ON OFF 55 sec 4 sec Defrost Cycle

ID fan, OD fan & 4WV ON OFF ON OFF COMP Defrost Cycle sec 20 sec Defrost Terminate Defrost Cycle (C2.4 Option) Defrost Cycle Option

SensorError Conditions Indoor Coil 2 sec or >76 ° C for > 2 sec or open or close Outdoor Coil 2 sec or >76 ° C for > 2 sec or open or close Room<-33 ° C or >50 ° C or open or close Error Thermistor Error

Error E01Req. manual resetE19I/D coil sensor 4 short E02Comp. 1 h/temp.(O/L)E20I/D coil sensor 1 open E03Comp. 2 h/temp.(O/L)E21I/D coil sensor 2 open E04Comp. 3 h/temp.(O/L)E22I/D coil sensor 3 open E05Comp. 4 h/temp.(O/L)E23I/D coil sensor 4 open E06Comp. 1 h/pre tripE24O/D coil sensor 1 short E07Comp. 2 h/pre tripE25O/D coil sensor 2 short E08Comp. 3 h/pre tripE26O/D coil sensor 3 short E09Comp. 4 h/pre tripE27O/D coil sensor 4 short E10Comp. 1 L/pre tripE28O/D coil sensor 1 open E11Comp. 2 L/pre tripE28O/D coil sensor 2 open E12Comp. 3 L/pre tripE30O/D coil sensor 3 open E13Comp. 4 L/pre tripE31O/D coil sensor 4 open E14Room sensor shortE32Comp. 1 de-ice E15Room sensor openE33Comp. 2 de-ice E16I/D coil sensor 1 shortE34Comp. 3 de-ice E17I/D coil sensor 1 short E35Comp. 4 de-ice E18I/D coil sensor 1 short ErrorCode ErrorCode DescriptionDescription