Johnson Controls PC090 THRU 240, PD 180 THRU 240 Troubleshooting, Unit Control Board Option Setup

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430645-YIM-D-0610

Flash Codes

Various flash codes are utilized by the unit control board (UCB) to aid in troubleshooting. Flash codes are distinguished by the short on and off cycle used (approximately 200ms on and 200ms off). To show normal operation, the control board flashes a 1 second on, 1 second off "heartbeat" during normal operation. This is to verify that the UCB is functioning correctly. Do not confuse this with an error flash code. To prevent confusion, a 1-flash, flash code is not used.

Alarm condition codes are flashed on the UCB lower left Red LED, See Figure Table 11. While the alarm code is being flashed, it will also be shown by the other LEDs: lit continuously while the alarm is being flashed. The total of the continuously lit LEDs equates to the number of flashes, and is shown in the table. Pressing and releasing the LAST ERROR button on the UCB can check the alarm history. The UCB will cycle through the last five (5) alarms, most recent to oldest, separating each alarm flash code by approximately 2 seconds. In all cases, a flashing Green LED will be used to indicate non-alarm condition.

In some cases, it may be necessary to "zero" the ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and release the UCB TEST/ RESET button once.

Flash codes that do and do not represent alarms are listed in Table Table 10.

Unit Control Board Option Setup

Option Byte Setup

•Enter The Option Setup Mode By Pushing The Option Setup / Store Button, And Holding It For At Least 2 Seconds.

•The Green Status Led (Option Byte) Will Be Turned On And The Red Status Led (Heat Delay) Is Turned Off.

•The 4 Led Will Then Show The Status Of The Labeled Option Low Ambient Lockout.

•Press The Up Or Down Button To Change The Led Status To Correspond To The Desired Option Setup.

•To Save The Current Displayed Value, Push The Option Setup / Store Button And Hold It For At Least 2 Seconds. When The Value Is Saved, The Green Led Will Flash A Few Times And Then Normal Display Will Resume.

NOTE: While in either Setup mode, if no buttons are pushed for 60 seconds, the display will revert to its normal display, exiting the Option Setup mode. When saving, the control board only saves the parameters for the currently displayed mode (Option Byte or Heat Delay). (Heat Delay not applicable on these units.)

Normal Maintenance

Prior to any of the following maintenance procedures, shut off all power to the unit, to avoid personal injury.

Periodic maintenance consists of changing or cleaning filters and general cleaning of the outdoor coil.

FILTERS - Inspect once a month. Replace Disposable or clean Permanent Type as necessary. DO NOT replace Permanent Type with Disposable.

MOTORS - Outdoor fan motors are permanently lubricated and require no maintenance.

OUTDOOR COIL - Dirt should not be allowed to accumulate on the outdoor coil surface or other parts in the air circuit. Cleaning should be as often as necessary to keep the coil clean. Use a brush, vacuum cleaner attachment, or other suitable means. Be sure that the power to the unit is shut off prior to cleaning.

Exercise care when cleaning the coil so that the coil fins are not damaged.

Do not permit the hot condenser air discharge to be obstructed by overhanging structures or shrubs.

Troubleshooting

Troubleshooting of components necessarily requires opening the electrical control box with the power connected to the unit. Use extreme care when working with live circuit! Check the unit nameplate for the correct range before making any connections with line terminals.

The wire number or color and terminal designations referred to may vary. Check the wiring label inside the control box access panel for the correct wiring.

Johnson Controls Unitary Products

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Contents 410A General NomenclatureInspection Safety ConsiderationsRenewal Parts Agency ApprovalsPC090 240 and PD180 240 Physical Data Physical DataLocation InstallationLimitations Shipping Operating Corner Weights & Center of GravityMinimum Clearances Clearance Description Distance in Inches ClearancesRigging Compressors Power WiringControl Wiring PhasingFLA Electrical DataLine Sizing Take Adequate PrecautionsRefrigerant Mains Start Installation Thermostat Single Stage Cooling TWO Stage Heating NC120 240 Liquid Line Solenoid Wiring YIM-D-0610 Model Model Crankcase Heaters Start-UpPiping And Electrical Connections Cooling Sequence Of Operation OperationSequence of Operation Dual Stage Heat Pump 4 pipe PD180-240 Dual Stage Heat Pump PC120-240Heating Sequence of Operation Fan Orientation, Control Box End Defrost OperationUnit Control Board PD180 thru 240 Unit Control Board Flash CodesNormal Maintenance TroubleshootingUnit Control Board Option Setup Option Byte SetupCooling Troubleshooting Guide If none of the above correct the error, replace the UCB Johnson Controls Unitary Products Cooling Charging Curves Cooling Charging Curves PC240 Typical PC090 Heat Pump Wiring Diagram Typical Wiring DiagramsTypical PC120 Heat Pump Wiring Diagram Typical PC180 240 Heat Pump Wiring Diagram Johnson Controls Unitary Products York Drive Norman, OK

PC090 THRU 240, PD 180 THRU 240 specifications

Johnson Controls has long been a leader in the HVAC and building efficiency industry, and the Johnson Controls PC090 THRU 240 and PD 180 THRU 240 series of commercial rooftop units exemplify their commitment to innovation and energy efficiency. These units are designed to provide optimal performance for a wide range of commercial applications, ensuring comfortable indoor climates while maintaining energy savings.

One of the standout features of the Johnson Controls PC and PD series is their advanced cooling and heating capabilities. Both series can operate efficiently across a varied range of capacities, typically from 90,000 to 240,000 BTU/h for the PC series and 180,000 to 240,000 BTU/h for the PD series. This versatility allows users to select the most appropriate unit size for their specific needs, optimizing performance without wasting energy.

The technology behind these rooftop units includes advanced inverter-driven compressors that enable variable-speed operation. This feature allows for precise temperature control, resulting in enhanced comfort and reduced energy usage. The units also integrate smart controls that enable easy monitoring and management, ensuring that the HVAC system can adapt to changes in occupancy or external weather conditions.

Another notable characteristic of the Johnson Controls rooftop units is their robust construction and reliability. Designed for outdoor use, these units can withstand harsh weather conditions while maintaining operational efficiency. They are equipped with corrosion-resistant materials and protective enclosures to prolong the life of the equipment.

The units are also engineered with eco-friendliness in mind, utilizing refrigerants with low global warming potential to minimize their environmental impact. Furthermore, their energy-efficient designs often qualify for various energy incentives, providing businesses an additional return on investment.

Ease of installation and maintenance is another hallmark of the PC and PD series. With a modular design, these units can be easily transported and installed. Maintenance tasks are simplified, allowing facility management teams to perform regular service checks efficiently and effectively.

Overall, the Johnson Controls PC090 THRU 240 and PD 180 THRU 240 series stand out in the commercial HVAC market due to their flexibility, advanced technology, and dedication to energy efficiency and environmental responsibility. These units not only meet modern energy codes but also contribute to a sustainable future with their innovative features and reliable performance.
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