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TemperZone OPA 250RLTFP-DZ, Установка и обслуживание

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9 Lock-out

Each protection function has a trip counter. A trip counter 
is reset to 0 whenever the compressor run request is 
removed. Any trip that has occurred more than 12 hours 
ago is removed from the trip count. For some protection 
functions, when the trip counter reaches value 3 (i.e. three 

consecutive trips occur) then the unit is “locked out”.

When a unit is locked out the compressor is not allowed to 
start. Lock-out is designed to protect the compressor from 
repeatedly starting when a serious fault exists that requires 
the attention of a service technician.

The display shows the code of the fault that caused the 
lock-out condition.

A unit that is locked out can be unlocked using any one of 

the following methods:

• Remove mains power from the unit for at least 3 seconds, 

then restore power.

• Issue an ‘unlock’ command via Modbus RTU serial 

communications.

• Reset the controller via Modbus RTU serial 

communications.

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Содержание OPA 250RLTFP-DZ

Страница 1: ...frigerant Class A2L which is mildly flammable The system shall be installed operated and stored in a well ventilated space If the refrigerant gas comes into contact with fire a poisonous gas may occur Be aware that R32 does not contain an odour If indoors the appliance shall be stored in a room away from continuously operating sources known to cause ignition of R32 refrigerant for example an opera...

Страница 2: ...00 mm The drain should have a slope of at least 1 in 50 and must not be piped to a level above the unit drain pipe refer fig 2 Figure 2 Condensate Drains OPEN DRAIN MINIMUM SLOPE 20 mm PER m 1 IN 50 100 mm MINIMUM 200 mm APPROX U TRAP 100 mm APPROX VENT PIPE FOR LONG CONDENSATE DRAIN RUNS 3 REFRIGERATION SYSTEM 3 1 General These OPA models each have a single inverter compressor to provide the flex...

Страница 3: ...ard signal return is terminal 0V Control by a building management system via Modbus RTU or BACnet IP serial communications 4 5 Unit Controller UC8 The unit s UC8 controller receives requests such as Unit On Off Start compressors Activate HEAT Reverse Cycle and transfer the requests to the outputs after enforcing safety timers Figure 4 UC8 Controller The Unit Controller provides several system prot...

Страница 4: ...d pair The cable shield should connect to terminal 0V on the UC8 controller The Master Slave communications cable connected between the UC8 controllers must be removed DIP switch 11 must be set to OFF on both UC8 controllers To avoid collisions of messages on the RS485 serial communications cable it is necessary to ensure each connected UC8 controller has a unique Modbus device address Refer to se...

Страница 5: ...ps 2 to 5 for each compressor 7 Test operation of the compressors when operating in heating mode 8 Check for desired supply air flow rate at each outlet 9 Touch up any outdoor unit paintwork damage to prevent corrosion 10 Sign the check label 5 3 Commissioning of variable speed EC indoor plug fan A unit equipped with variable speed EC indoor plug fan allows adjustment of the fan speed to obtain th...

Страница 6: ...e minimum capacity for example 0V on input VC then the compressor operates on minimum duty If a unit operates on low capacity for extended periods then the unit may periodically perform oil flush cycles Under such operating conditions compressor lubricating oil may slowly settle in parts of the refrigeration system other than the compressor Oil flush cycles help to return the lubricating oil to th...

Страница 7: ...m to deliver the heating when most needed Heating capacity at design conditions may be incorrect As the outside temperature falls heat losses through the walls floor and ceiling increase Check the unit s brochure for information on the minimum maximum operating temperatures 8 3 When heating units have de icing cycles built in to remove ice on the outdoor coil This usually means reversing the cycle...

Страница 8: ...city CAP Capacity 100 Expansion valve 1 opening EE1 Expansion valve 1 75 open Expansion valve 2 opening EE2 Expansion valve 2 75 open 10 UC8 CONTROLLER DISPLAY 11 VIKING CONTROLLER FACTORY SETTINGS Installer to check settings for site suitability and adjust as necessary SMT920 Controller RS SSD Wall Control Function Factory Settings changes from defaults Function Factory Setting PIN number 21 don ...

Страница 9: ...s an indication that the compressor is being starved of refrigerant gas Common reasons for this could be a lack of refrigerant under charged or loss of charge or a problem with the expansion device for example a stuck accurator or loose wiring to an EEV The protection is activated when discharge superheat exceeds 60K for longer than 30 minutes The display shows the message Hi dSH when protection i...

Страница 10: ...cked out the compressor is not allowed to start Lock out is designed to protect the compressor from repeatedly starting when a serious fault exists that requires the attention of a service technician The display shows the code of the fault that caused the lock out condition A unit that is locked out can be unlocked using any one of the following methods Remove mains power from the unit for at leas...

Страница 11: ... 3 4 1 1 INPUT kW 2 5 1 5 0 5 2 0 1 0 3 0 3 5 Amps 500 1000 1500 2000 2500 0 100 200 300 AIR FLOW l s AVAILABLE EXTERNAL PRESSURE Pa 2 5 m s Face Velocity 400 500 0 NOMINAL INPUT kW 3 0 2 0 1 0 2 5 1 5 3 5 4 0 8V 7V 5V 6V 9V 8V 7V 6V 5V 2 9 2 0 1 5 1 0 4 7 2 4 3 4 4 3 1000 1500 2000 2500 3000 0 100 200 300 AIR FLOW l s AVAILABLE EXTERNAL PRESSURE Pa 2 5 m s Face Velocity 400 500 500 NOMINAL 9V 8V ...

Страница 12: ...o scroll through list IMPORTANT Digital compressors must be operating at 100 for at least 10 minutes when taking these readings System 1 Cool Cycle Low Pressure SLP kPa Outdoor Ambient temperature C Evap temperature Et C Indoor Return air temperature C Suction Line temperature SLt C Indoor Supply air temperature C Suction Superheat SSH K Indoor fan amps A Discharge Line Pressure dLP kPa Fresh Air ...

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