Carrier 50XJ064-104 specifications Run Test Troubleshooting, Forcing an Input or Output

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TROUBLESHOOTING

Refer to Tables 17-21 for troubleshooting information.

Run Test Troubleshooting — The automatic run test is a diagnostic tool used during unit start-up. Table 17 describes troubleshooting specifically for the automated run test.

Table 17 — Run Test Troubleshooting

PROBLEM

POSSIBLE CAUSE

Control modules do not have lights when unit power on.

Transformer open. Circuit breaker open. Power wiring open. Module failure.

Control display does not light up when unit power on.

Connection location. Interface cable open. Display failure.

Run test will not start.

Pre-existing ALARM (red)? Not “Logged in” with password.

 

Switch not in Local.

WARN (yel) does not light during run test.

Wiring open. Lamp failure. Control module failure.

ALARM (red) does not light during run test.

Wiring open. Lamp open. Control module failure.

Run test stops, ALARM (red) light is lit after it blinks once.

Bypass switch to LINE. Mode switch to OFF. Duct high

 

pressure switch open. Fire shutdown input or jumper open.

 

Supply air temp out of range. Duct static pressure sensor out of range.

 

Compressor resistor board wiring error or failure.

Fan does not start/ALARM (red) blinks 2 times.

Fan relay failure.

Run test stop, ALARM (red) light is lit after blinking 3 times.

Wiring open. VFD connection error. VFD setup error. Fan relay failure.

 

Current isolator failure. Control module failure.

Run test stop, ALARM (red) is lit after it blinks 4 times.

VFD connection error. VFD setup error.

Fan does not increase speed.

Current isolator load adjustment too low.

Fan does not stop after ALARM (red) blinks 5 times.

Fan relay failure.

Fan rotation is backwards.

VFD to motor wiring sequence error. VFD setup error.

Run test stop, ALARM (red) is lit after blinking 6 times.

Wiring open. Compressor resistor board wiring error or failure.

Compressor 1 does not start.

High-pressure switch, low-pressure switch, coil frost switch,

 

or compressor protection module open. Compressor relay failure.

 

Contactor failure. Control module failure. No refrigerant charge.

Run test stop, ALARM (red) is lit after blinking 7 times.

Wiring open. Compressor resistor board wiring error or failure.

Compressor 2 does not start.

High-pressure switch, low-pressure switch, coil frost switch,

 

or compressor protection module open. Compressor relay failure.

 

Contactor failure. Control module failure. No refrigerant charge.

Run test stop, ALARM (red) is lit after blinking 8 times.

Wiring open. Compressor resistor board wiring error or failure.

Compressor 3 does not start.

High-pressure switch, low-pressure switch, coil frost switch,

 

or compressor protection module open. Compressor relay failure.

 

Contactor failure. Control module failure. No refrigerant charge.

Run test stop, ALARM (red) is lit after blinking 9 times.

Wiring open. Compressor resistor board wiring error or failure.

Compressor 4 does not start.

High-pressure switch, low-pressure switch, coil frost switch,

 

or compressor protection module open. Compressor relay failure.

 

Contactor failure. Control module failure. No refrigerant charge.

Compressor rotation is backwards.

Field power wiring sequence error. Compressor power wiring sequence error.

“C” message in I/O status display.

No input signal/communication failure.

“Service” message in I/O status display.

Value is forced from 6400 keypad entry.

“Supervisor” message in I/O status display.

Value is forced from network communication (i.e., PC).

ALARM (red) always on, will not enter run test.

SAT, DSP, CSMUX, DHS, or PHASE input values out of range. Mode switch OFF.

Forcing and Clearing an Input or Output — Dur- ing unit operation and/or troubleshooting, it may be necessary or desirable to clear an input or output. Tables 18 and 19 describe the procedure for clearing inputs and outputs.

Table 18 — Forcing an Input or Output

 

STEP # INSTRUCTION/ACTION

RESULT

1. Press 3, SET, ENTER

“Controller Password”

2. Press ENTER

“Log in to Controller” “Enter Password”

3. Press 1111, ENTER

“Log in to Controller” “Logged in”

4. Press STAT

“Hardware Points”

5. Press ENTER

“Supply Air Temperature”

6.

Press down arrow to obtain desired item

(NOTE: order is PCB1 I/O, PCB2 I/O, PCB3 I/O)

7.

Key in force value (1=on/start, 0 = off/stop), ENTER

force value/status “Service”

Table 19 — Clearing a Forced Input or Output

STEP # INSTRUCTION/ACTION

RESULT

1. Press 3, SET, ENTER

“Controller Password”

2. Press ENTER

“Log in to Controller” “Enter Password”

3. Press 1111, ENTER

“Log in to Controller” “Logged in”

4. Press STAT

“Hardware Points”

5. Press ENTER

“Supply Air Temperature”

6. Press down arrow to obtain desired item

(NOTE: order is PCB1 I/O, PCB2 I/O, PCB3 I/O)

7. Press CLEAR, ENTER

auto value/status (NOTE “Service” must be gone)

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Contents Controls Operation Troubleshooting Page SW2 SW3 SW1 Control Inputs and OutputsManufacturer Part Number Communication Cable RecommendationsWhen the unit is off, both valves are closed Field Terminal Blocks for 50XJ Unit Space Temperature Sensor Typical Wiring 33ZCT55SPT Operative USE Keys LID Function KeysOperative Keys Numeric KeysOmnizone Vpac KEY Algo Stat Hist Srvc Alrm SET Quick Access ChartOmnizone Page SETPT01 OMNIZONESETPT02 Controller Set PointsConfiguration Parameters Controller Hardware PointsSoftware Points Operation Page Page RUN VFD Non-Trip Messages for 50XJ Unit Keys and Functions for 50XJ VFDVFD Trip Messages for 50XJ Unit VFD Mode Summary for 50XJ Unit KEY Operaton LED Message ExplanationDown 50BV VFD Display Trip Messages for 50BV VFD Non-Trip Messages for the 50BV VFDEPH1 OL1OL2 EphoError Communication Problem Possible Causes Remedies Code Run Test Troubleshooting Forcing an Input or OutputClearing a Forced Input or Output Alarms Displayed at Unit LID Comp Volts Range Compressor MUX Board VoltagesUnit Wiring 50BVJ,K Low Voltage Schematic50BVJ,K High Voltage Schematic TRANS-3 24VAC BLU 50BVW,X Low Voltage Schematic50BVW,X High Voltage Schematic PCB2 J1 50BVJ,K,W,X Field-Installed Low Voltage Schematic3 4 5 6 7 50BVJ,K Field-Installed Low Voltage SchemticField Wiring 50BVW,X Field-installed Low Voltage SchematicBpss RoccAqua SPTLOW Voltage Control Wiring 50XJ Low Voltage Control WiringBLK VIO Switch Settings 50XJ 115V Control WiringPower Wiring 50XJ Power WiringPCB3 50BV,XJ Accessory Control Module PCB3 SchematicIFM HeatCdwfs HRNDescription Value Units Status Force Name Ewtrst NumcmpRsetrto Cdwf 0=NO,1=YES Cdfwswt Econ 0=NO,1=YES EwtsnsDescription Value Units Name SETPT00 PntnameSETPT09 SENSDI00High Conversion Endpoint 309.77 Comparison Point OMNIZONEDSALM02 Phase Protection Monitored Input Point OMNIZONEDSALM05 Fire alarm Monitored Input Point OMNIZONEDSALM08 Compressor 1 Alarm Monitored Input Point DISCRO00 LINK09 OMNIZONEINTLK02 Ok to Cool Discrete Output Point HCVAV01 VOLTI00SETPT03 NTFC00OMNIZONELMALM02 Entering WaterTemp Monitored Input Point DOW4 DOW1DOW2 DOW3Maintenance Screens LMALM03 FalseCcvvrf ADAPT03RAM ADAPT02ADAPT01 EepromDodxrf Description Value Units Status Force Name CCVAV01 ANCTL01Exetime LMALM02Resched Taskstat Tasktimr

50XJ064-104 specifications

The Carrier 50XJ064-104 is a high-efficiency rooftop air conditioning system designed to deliver exceptional cooling and heating capabilities for diverse commercial applications. One of the standout features of this model is its robust cooling capacity of 64,000 BTUs, making it suitable for mid to large-sized spaces. The 50XJ064-104 is engineered using advanced technologies to ensure energy efficiency and reliable performance, contributing to reduced operational costs and environmental sustainability.

One of the primary technologies employed in the Carrier 50XJ064-104 is the high-efficiency scroll compressor. This component plays a pivotal role in optimizing energy usage while delivering consistent cooling output. The system also incorporates an economizer that allows for enhanced energy savings by utilizing outdoor air for cooling when conditions are favorable. This not only decreases reliance on the compressor but also improves indoor air quality.

The microprocessor-based controls in the 50XJ064-104 provide precise temperature regulation, ensuring optimal comfort levels in various applications. These controls allow for easy programming and can be integrated into building management systems for centralized oversight. Additionally, the unit features a built-in fault detection and diagnostic system that aids in identifying potential issues before they escalate, minimizing downtime and maintenance costs.

The Carrier 50XJ064-104 is designed with durability in mind. It features a weather-resistant cabinet, designed to withstand harsh outdoor conditions and prolong service life. The high-quality insulation within the unit not only enhances energy efficiency but also minimizes noise levels, making it an ideal choice for urban environments where sound control is critical.

Another important characteristic is its environmentally friendly R-410A refrigerant, which has a lower impact on ozone depletion compared to older refrigerants. This aligns with Carrier's commitment to creating sustainable HVAC solutions that comply with current environmental regulations.

Overall, the Carrier 50XJ064-104 stands out for its combination of efficiency, advanced technologies, and durable construction. Whether for commercial buildings, retail spaces, or industrial applications, this rooftop air conditioning unit is designed to provide reliable performance and comfort year-round.
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