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SS-SVX002B-EN

43

Troubleshooting

Turn off all power to the unit before conducting any
troubleshooting procedures unless the procedure
specifically requires the system to operate. For
troubleshooting purposes, the system may be operated
with the doors open by using vice-grip pliers to turn the
shaft of the main power disconnect switch to the “On”
position.

Note:

When the switch is turned on, high voltage will be
present inside the cabinet. Exercise caution to
prevent injury. Keep hands, clothing and tools clear
of the electrical terminals and rotating
components. Ensure that your footing is stable at
all times.

Table 7.

Troubleshooting

SYMPTOM

PROBABLE CAUSE

RECOMMENDATION

Suction Pressure Too Low

a. Loss of refrigerant (bubbles in sight glass). Locate leak and repair. Recharge system.

b. Expansion valve stuck or obstructed (short
cycle or continuous running).

Remove and clean or replace valve.

c. Clogged drier/strainer (feels cold).

Replace with new drier/strainer.

d. Dirty air filters (reduced airflow).

Clean/replace filters.

Evaporator Coil Ices

a. Low airflow.

1. Check filters. Replace as needed.

2. Check for and clear any obstructions across

or in the (supply) discharge airstream.

3. Check evaporator fan is operating

4. Check fan speed. Increase if needed using

the system controller.

b. Temperature setting too low

Increase temperature set point. (68°F min.).

c. Discharge air short circuiting back to return.

Check discharge airflow orientation in the
conditioned space.

d. Low refrigerant charge.

Find leak, repair and recharge system.

Evaporator Fan(s) Fail to Start

a. Power failure.

1. Check main power source voltage.

2. Check power input cable.

b. Motor starter protector tripped.

Reset motor starter protector and check
amperage of motor.

c. Control transformer circuit breaker tripped.

Check for short circuit or ground fault, if none,
reset circuit breaker.

d. Defective contactor

Repair or replace.

e. No control signal to fan(s).

Check the Control I/O Board for a Modbus
control signal to the fan(s). Refer to the electric
drawing to determine the correct I/O board
terminal numbers. This must be done within 15
seconds of turning the disconnect switch “On” or
the controller will go into “Air Proving Alarm”
mode.

f. EC fan’s internal overheat protection
interrupted fan motor operation

Determine the cause of the interruption and
correct. Possible causes are:

1. Blocked rotor

2. Low supply voltage > 5 seconds

3. Loss of phase > 5 seconds

After causes 1, 2, and 3 above are corrected, the
motor will automatically reset.

After causes 4 and 5 below are corrected, the
fan(s) must be manually reset by turning off
power for 20 seconds:

4. Over temperature of electronics

5. Over temperature of motor

Control is Erratic

Wiring improperly connected or broken.

Check wiring against schematic diagram.

Condenser Pressure Too High

a. Non condensable gas or air in the
refrigeration system.

Recover refrigerant. Replace drier/strainer.
Evacuate to 50 microns and recharge.

b. Condenser air intake is blocked.

Remove debris and clean condenser.

c. Overcharge of refrigerant.

Reclaim excess refrigerant from system.

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Содержание CyberAir DX

Страница 1: ... installation starting up and servicing of heating ventilating and air conditioning equipment can be hazardous and requires specific knowledge and training Improperly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all precautions in the literature and on the tags stickers and labels that are attached to...

Страница 2: ... have additional requirements that must also be adhered to for responsible management of refrigerants Know the applicable laws and follow them WARNING Personal Protective Equipment PPE Required Failure to wear proper PPE for the job being undertaken could result in death or serious injury Technicians in order to protect themselves from potential electrical mechanical and chemical hazards MUST foll...

Страница 3: ...rane reserves the right to revise this publication at any time and to make changes to its content without obligation to notify any person of such revision or change Trademarks All trademarks referenced in this document are the trademarks of their respective owners ...

Страница 4: ...ield Installed 20 Floor Stands 20 Plenum Box 21 Condensate Pump 22 Types of Control 22 Remote Water Detector 23 Piping Connections 23 Refrigerant Piping 24 Water Glycol and Hot Water Piping 25 Condensate Drain 25 Humidifier 26 Utility Connections 26 Main Power 26 Optional Equipment 28 Interconnecting Remote Equipment 28 System Charging Procedures 30 Water Water Glycol Systems 30 Refrigerant Chargi...

Страница 5: ... Common Repairs Component Re placement 40 Troubleshooting 43 Product Support 46 Factory Authorized Start Up Warranty Inspec tion 46 Technical Support 46 Obtaining Warranty Parts 46 Obtaining Spare Replacement Parts 46 Appendix A 47 Forms 47 Checklist for Completed Installation 47 ...

Страница 6: ... 7 8 Capacity kW 021 028 035 053 070 088 105 Digit 9 Cooling Method D DX Digit 10 Number of Circuits 2 Dual circuit Digit 11 Heat Rejection A Air G Glycol W Water Digit 12 Secondary Cooling Options 0 None F Water side Economizer W Alternate water source Digit 13 Fan Location I In unit Digit 14 Additional Special Options 0 Standard T Tandem compressors S Special ...

Страница 7: ...ontrol of a conditioned space There are two air flow pattern configurations up flow and down flow and several cabinet sizes based on the type of system and capacity Regardless of configuration CyberAir systems are compact and versatile See the Installation drawing provided with your unit for the layout and dimensions of the cabinet The CyberAir unit is provided with a factory mounted main power di...

Страница 8: ...acity The following figures depict the internal layouts of up flow and down flow CyberAir units and identifies the major components Location of the major components may vary depending on model number and options purchased Note Customer specified non standard features or design variations may not be described in this manual Refer to the installation and or electrical drawings supplied with your uni...

Страница 9: ...ayout of a TR CFU up flow unit and identifies the major components Figure 4 Typical Internal Layout Up flow HUMIDIFIER INLET DRAIN OUTLET PIPES ELECTRIC REHEAT ELEMENTS BEHIND EC FANS ELECTRIC BOX HUMIDIFIER COMPRESSORS CONDENSATE PUMP LOCATION MAY VARY AIR FILTERS CUT AWAY TO SHOW DETAILS FIRESTAT OPTIONAL T H SENSOR SMOKE DETECTOR OPTIONAL COILS MANUAL RESET OVERHEAT SWITCHES EC FANS REFRIGERANT...

Страница 10: ...nsed service individual who has been properly trained in handling exposed rotating and electrical components perform these tasks Circuit Breakers Motor Start Protectors CyberAir units incorporate state of the art component protection with the use of motor start protectors and circuit breakers If an overload occurs the switches must be manually re set after the overload condition is cleared Compres...

Страница 11: ...te Temperature Humidity Sensor p 22 for descriptions of the types of T H control methods that may be utilized Optional Equipment Heaters The precision A C unit incorporates heaters for re heating the supply air as required to offset the sensible cooling of the system during the dehumidification cycle and for the automatic heating mode As a standard electric resistance heating elements are factory ...

Страница 12: ...The cooling circuits are typically comprised of one compressor per circuit The circuits are staged to operate as needed based on incremental cooling stage enable temperature set points as programmed in the system controller Each stage is assigned an offset to the temperature set point for turning the compressors on The controller turns each stage on and off as needed based on the temperature set p...

Страница 13: ...user set point the free cooling mode is enabled to take advantage of the low ambient conditions to provide cooling with partial use or without the use of the system compressor s Free cooling provides an excellent opportunity for reduced operational cost by reducing the compressor operating hours The free cooling sequence is enabled if the entering fluid temperature is below the user adjustable fre...

Страница 14: ...he outside air temperature increases above the ambient air switch over setting the fluid cooler controls cycle back to typical DX heat rejection allowing the leaving fluid control set point to increase above the prevailing ambient conditions The indoor unit s inlet fluid temperature sensor monitors the fluid temperature and deactivates the free cooling mode once the fluid temperature increases abo...

Страница 15: ...t out set point temperature is reached provided the minimum run time expires AWS cooling will continue if the return air temperature is above the AWS cooling cut in temperature set point and the chilled water inlet temperature is 55 F or cooler Ifthechilledwatertemperatureisabove55 F AWScooling turns off the control valve closes If the compressor cut in set point is reached the compressor turns on...

Страница 16: ...movable hinged access doors are located on the front of the cabinet The number of access doors vary depending on size and configuration of the unit The electric box is located behind the front door with the controller user interface display In order to have full service access through the front of the unit no permanent obstructions should be placed in front of the cabinet See Figure 10 p 16 for th...

Страница 17: ...t in unit dropping which could result in death or serious injury and equipment or property only damage Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted Each of the cables chains or slings hooks and shackles used to lift the unit must be capable of supporting the entire weight of the unit Lifting cables chains or slings may not be of the same leng...

Страница 18: ...Cut out an opening in the raised floor slightly larger than the cabinet s overall base dimension so the weight of the A C unit is supported by the stand Figure 12 Typical TR CFD Down flow Installation OPTIONAL FLOOR STAND OPTIONAL CABLE TYPE WATER DETECTOR SECURE WATER DETECTOR CABLE TO FLOOR WITH J CLIP WIRE TIE w ADHESIVE MOUNT OR MASTIC ADHESIVE ...

Страница 19: ...possible Figure 13 Up flow Configuration Air Patterns TOP DISCHARGE 2 OR 3 WAY PLENUM RETURNAIRINLET RETURN AIR INLET 3 WAY DISCHARGE PLENUM OPTIONAL SUPPLY AIR OUTLET DUCT SUPPLY AIR OUTLET Down flow Configuration Air Patterns In a down flow configured unit the conditioned supply air discharges through the bottom of the cabinet into a raised floor There are two basic return air distribution metho...

Страница 20: ...wing for minimum and maximum height adjustments Adjust the height of the floor stand as described in the sections that follow Once it is level and even with the raised floor lock all the feet in place Place the A C unit on top of the stand Floor Stand Height Adjustment Standard and Low Seismic Floor Stands Standard Floor Stands First loosen the middle hex nut jam nut on each leg Turn the top hex n...

Страница 21: ... holes in the plate Ensure all the screws are tightened Take care not to strip the threads For high seismic stands attach the plates to the stand with 1 2 inches bolts as shown in the floor stand assembly drawing Drill holes for the fasteners into the base of the A C cabinet through the upper holes in the plate Secure the A C unit to the floor stand fasteners to be customer furnished Ensure all th...

Страница 22: ... sensing supply air conditions or on a wall in the conditioned space for sensing actual room conditions see the following figure Figure 20 Temperature Humidity Sensor Location Supply Air Monitoring As an option a field installed T H sensor may be used for supply air monitoring The sensor is equipped with a 20 foot long cable and is to be field installed in the supply air stream Position the sensor...

Страница 23: ...hen water is present current will flow between the electrodes The base is provided with a mounting hole in the center which may be used to secure the water detector in place Note Do not place the spot type water detector on an electrically conductive surface Cable type water detector Lay the cable water detector flat across the sub floor where water could collect see Figure 12 p 18 Secure the cabl...

Страница 24: ...sing damage Clear all pipe connections of debris and prepare the connections for soldering Use only L or K grade refrigerant copper piping Be careful not to allow solder piping debris to get inside refrigerant lines Silver solder containing a minimum of 15 silver is recommended Dry nitrogen should be flowing through the tubing while soldering at a rate of not less than 1 2 CFM 03 06 M3 minute Refr...

Страница 25: ...zed up to 100 psi and sealed when the unit leaves the factory Before installing the interconnecting piping release the pressure via an available stem valve or Schrader valve prior to uncapping the pipes If newly installed supply and return piping is used it is recommended that the piping system be cleaned prior to connecting it to the unit If solvents cleaning solutions are used ensure they are co...

Страница 26: ...xternal filter may be needed Important Do not use de mineralized water Refer to the humidifier operator s manual supplied with the equipment for complete manufacturer s information on the humidifier and the supply water recommendations In most cases the humidifier empties into the condensate drain line during the flush drain cycle Refer to the installation drawing provided with your unit for the s...

Страница 27: ... for recommended entrance hole locations Route the main power wires into the electric box and terminate the wires at the line side of the main power disconnect switch as shown in the electrical drawing A separate equipment ground lug is provided within the electrical box for termination of the earth ground wire Optional Dual Power Route the primary and alternate power source wires to the disconnec...

Страница 28: ... normally closed switch rated at 5 amperes at 24Vac is required for this purpose Two conductors from the normally closed switch must be connected to the control terminal board located in the electric box Refer to the supplied electrical drawing for the appropriate wire terminations Interconnecting Remote Equipment Water Cooled Systems TR CFD TR CFU _ _ _ D2W Models Systems equipped with an interna...

Страница 29: ...ngle Point Power Connection Shown for Drycooler Pump Package TO BE INSTALLED IN ACCORDANCE GLYCOL UNITS ONLY ELECTRIC 24VAC PUMP PACKAGE BOX SEE NOTE 1 WITH NFPA 70 N E C INTERCONNECTING FIELD WIRING MAIN POWER SUPPLY 208 575V 3PH 60Hz GLYCOL UNITS ONLY DRYCOOLER 2 NUMBER OF CONDUCTORS MAY VARY DEPENDING ON OPTIONS PROVIDED NOTES NFPA 70 N E C 208 575V 3PH 60Hz MAIN POWER SUPPLY IN ACCORDANCE WITH...

Страница 30: ...oved before piping and charging the unit Before charging check the unit nameplate to confirm that charging is performed with the correct type of refrigerant CyberAir systems utilize R 410A refrigerant Note Refrigerant charging must be performed by a qualified air conditioning technician R 410A is a blended refrigerant recognized for being safer for the environment Refrigerants that are multi compo...

Страница 31: ... condenser if it is designed for applications where ambient conditions may drop to 30 F or lower When selecting the condenser refrigerant weight from the following table determine if your condenser includes a receiver and ensure you select the charge weight from the correct column in the table Table 3 Weight of R 410A refrigerant for condensers lbs per compressor circuit SCS Condensers Model Numbe...

Страница 32: ...y installed refrigerant piping Note A vacuum pump should be used that is capable of evacuating the entire volume of the A C system including newly installed or existing piping It is essential to use a well maintained pump that is in good operating condition Always ensure it contains clean fresh oil Manufacturers recommend you change the oil in the pump regularly to maintain its ability to remove m...

Страница 33: ...with the A C unit turned Off 1 Bleed air from hoses and break the vacuum by supplying liquid refrigerant R 410A to the discharge port near the compressor until the pressure is equalized This holding charge allows the low pressure switch to hold enabling the compressor to operate throughout the process of charging the system Fine Tuning The System Charge Once the initial charge is completed refrige...

Страница 34: ... enable a call for dehumidification lower the humidity set point This process may need to be repeated several times After cycling the system through the hot gas reheat cycle recheck the system charge with the system only in the Cooling mode Important Remove the blockage to the air intake of the condenser 7 Fill out the applicable sections of Warranty Registration and Start Up Checklist 30 F Ambien...

Страница 35: ...ally control the head pressure On systems with more than one fan on the condenser the remaining motors cycle on and off based on pressure Factory setting Switch contacts are set to close on a pressure rise to 440 psig and open at 330 psig Set point range is 200 to 610 psig Thedifferentialis setat 110 psiand is adjustable 30 F Flooded Head Pressure Control Used for outdoor or indoor installations w...

Страница 36: ...unted inside the electric box Should adjustment be necessary refer to the IOM manual provided under separate cover for the system controller Adjustment is made by entering the Service menu CAUTION Compressor Damage Do not exceed 20 F superheat Exceeding this temperature may cause failure of the compressor Snap Acting Hot Gas Bypass Optional The snap acting hot gas bypass system provides some modul...

Страница 37: ...hat if the humidifier capacity potentiometer requires adjustment the adjustment is made in small increments and verified Refer to the humidifier manual sent under separate cover with your unit for the location of the capacity adjustment potentiometer ...

Страница 38: ...with your unit 7 Testhumidificationoperationbycreatingademandfor humidification Use an amp meter to determine current draw of the humidifier Visually check for vapor leaving the steam head or feel if the cylinder is warm to verify if the humidifier is operational Note In all cases 1 to 6 hours might be required to achieve the desired level or rise in humidity in the conditioned space Once room con...

Страница 39: ... Checkforhumidityintherefrigerantby viewing the color of the indicator in the center of the sight glass and comparing it to the color scale on the outer ring If humidity is present the system must be evacuated and recharged Check the superheat and sub cooling temperatures semi annually and ensure they are within the range shown in the refrigerant pressure temperature table in Section 2 9 6 If nece...

Страница 40: ...rform repairs on the A C system If field repairs are necessary the following procedures apply Leak Detection Several methods can be used to detect a leak in the refrigeration system The most modern and easiest method is to use an electronic leak detector Follow the manufacturer s directions and any leak can be quickly located A second method is to use soap bubbles Apply a solution of soapy water w...

Страница 41: ... 14 Recharge the system 15 Turnonthepoweratthemainpowerdisconnectswitch and start the system at the controller Burn Out Acidic Cleanup Procedure WARNING Risk of Burns Avoid touching or contacting the gas and oil with exposed skin Severe burns will result Use long rubber gloves in handling contaminated parts Note Cleaning operations must be performed by a journeyman refrigeration mechanic or air co...

Страница 42: ...u MUST put on all Personal Protective Equipment PPE 11 Loosen the steam hose clamp s and pull the steam hose off vertically 12 Using a flat head screwdriver press the tab on the cable tie to release it Lift the cylinder straight up to disengage it from the humidifier 13 Place the new cylinder on the side mounting slots within the unit ensuring the cylinder mounting stubs are seated properly 14 Rep...

Страница 43: ...n in the conditioned space d Low refrigerant charge Find leak repair and recharge system Evaporator Fan s Fail to Start a Power failure 1 Check main power source voltage 2 Check power input cable b Motor starter protector tripped Reset motor starter protector and check amperage of motor c Control transformer circuit breaker tripped Check for short circuit or ground fault if none reset circuit brea...

Страница 44: ...gerant charge low pressure safety switch Locate and repair leak Recharge system d Condenser pressure too high high pressure safety switch Check condenser for obstructions e Minimum off time has not expired Wait for time to expire System Short of Capacity a Low refrigerant indicated by bubbles in sight glass Check for leaks Repair and recharge system b Expansion valve stuck or obstructed short cycl...

Страница 45: ...flow Correct or replace as needed d Manual reset overheat safety switch tripped Reset manual overheat safety switch see item immediately above e Heater element burned out Check continuity with an ohmmeter Replace heater element Hot Water Heater Inoperable a Low hot water flow Check hot water flow at supply source Inspect piping for leaks or obstructions b Hot water supply temperature too low Check...

Страница 46: ...del Number Sales Order Number Item Number Unit Serial Number Description of Problem Obtaining Warranty Parts A support technician will provide troubleshooting assistance over the telephone If it can be determined that a part may be defective a warranty authorization for a replacement part will be processedbyTechnicalSupport Thereplacementpartwill then be shipped via UPS ground If the customer requ...

Страница 47: ...position Plenum box installed if required Filter s installed Ductwork completed or optional plenum installed if required Incoming line voltage matches equipment nominal nameplated rating tolerances Main power wiring connections to the equipment including earth ground have been properly installed Customer supplied main power circuit breaker HACR type or fuses have proper ratings for equipment insta...

Страница 48: ...e are committed to using environmentally conscious print practices Trane by Trane Technologies NYSE TT a global climate innovator creates comfortable energy efficient indoor environments for commercial and residential applications For more information please visit trane com or tranetechnologies com SS SVX002B EN 08 Apr 2020 Supersedes SS SVX002A EN Jan 2020 ...

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