Name: Carrier 48/50PG C03-14
Brand: Carrier
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C08549

Fig. 25 − 48PG03−16 Control Wiring Schematic

48/50PG and PM

Table of Contents1
Safety Considerations2
- Comfortlink Control3
- Scrolling Marquee3
- Accessory Navigator Display4
- CCN Tables and Display4
- Operation4
- System Pilott and Touch Pilot Devices4
- Compressor Rotation6
- Conventions Used in this Manual6
- Crankcase Heater(S)6
- Refrigerant Service Ports6
- Unit Preparation6
General3
Basic Control Usage3
Start-Up6
- Power Supply6
- Internal Wiring6
- Evaporator Fan6
  - 48/50PG03−14 Size Units, Panel and Filter Locations (48PG03−07 Unit Shown)7
  - 48/50PM16−28 Size Units, Panel and Filter Locations (48PM24 Unit Shown)7
Controls Quick Set−Up8
- Condenser Fans and Motors8
- Gas Heat (48PG and 48PM)8
- Control Set Point and Configuration Log8
- Return−Air Filters8
- Outdoor−Air Inlet Screens8
- Air Baffles8
- Accessory Installation8
- Orifice Change (48PG and 48PM)8
- Energyx8
- Space Temperature Sensor Control − Direct Wired9
- T−58 Communicating Room Sensor9
- System Pilot − Communication Space Sensor9
- (T−55 or T−56 or T−59)9
- CCN Linkage Control9
- Space Humidistat Control9
- Relative Humidity Sensor Control9
- CCN Communication9
- Accessories9
- Programming Operating Schedules10
Service Test12
- Independent Outputs12
- Fan Test12
- Cooling Test12
- Humidi−Mizert Test12
- Heating Test13
- Dehumidification Control13
- Remote Occupancy13
- Alarm Output13
Third Party Control13
- Cooling/Heating Control13
- Fire Shutdown13
Controls Operation14
- Economizer Monitoring14
- Economizer Damper Control14
- Unit Configuration14
- Display Configuration14
  - Thermostat Control Type (T.CTL)15
  - Fan on When Occupied (OC.FN)15
  - Shut down on IDF Failure (IDF.F)15
  - Fan Status Switch (FN.SW)15
- Modes15
- HVAC Operation Disabled (HV.DN)16
- General Operation16
- Temperature Setpoint Determination16
- Timed Override in Effect (T.OVR)16
- Occupancy Determination17
  - Level 1 Priority17
  - Level 2 Priority17
- Indoor Fan Operation17
- Cooling Operation18
  - Cooling Mode Control18
  - Staging Control18
  - Thermostat Control18
  - Compressor Control19
  - Outdoor Fan Control19
  - Space Sensor Control19
  - Units Without Humidi−Mizert System19
  - Outdoor Fan Level Transitions20
  - 48/50PG03−16 Fan Level Control of Fans and Contactors20
  - 48/50PG20−28 and PM16−28 Fan Level Control of Outdoor Fan Contactors (OFC(X))20
- Heating Operation21
  - Heating Mode Control21
  - Supply−Air Temperature Sensor (SAT)21
  - Heat Relay Control22
  - Integrated Gas Controller (IGC)22
- Economizer23
  - Economizer Actuator Communications23
  - Unoccupied Free Cooling23
  - LCSP and HCSP Transitions for Space Temperature Mode23
- Optional Humidi−Mizert Dehumidification System24
  - Dehumidification Demand24
  - Reheat Modes24
  - Power Exhaust24
  - Control Modes with Humidi−Mizert System25
  - Normal Cooling Mode — Humidi−Mizert System25
  - Subcooling Mode (Reheat1) — Humidi−Mizert System26
  - Hot Gas Reheat Mode (Reheat2) — Humidi−Mizer System26
  - Subcooling Mode (Reheat1) — Humidi−Mizer System27
  - Hot Gas Reheat Mode (Reheat2) — Humidi−Mizert System 48/50PG20−28 and 48/50PM16−2828
  - Reheat Control28
  - Reheat Outdoor Fan Control28
  - Reheat Mode Diagnostic Help29
  - Humidi−Mizert System Valve Locations29
  - Air Baffles30
- Indoor Air Quality (IAQ)30
  - IAQ (Analog Input)30
  - Air Baffle Dimensions31
  - IAQ (Switch Input)33
  - Outdoor Air Quality (Analog Input)33
  - IAQ Control33
  - Fan Enable (Analog IAQ Sensor)34
  - Fan Enable (Switch Input)34
- Energyx34
- Adaptive Fan34
  - Fan Speed − Reheat2 (FS.RH)35
  - Fan Speed − Heating (FS.HT)35
- Temperature Compensated Start35
- Temperature Compensated Start Logic35
- Carrier Comfort Network (CCN)R Configuration35
  - Global Schedule Broadcast (BROD"B.GS)36
  - CCN Broadcast Acknowledger (BROD"B.ACK)36
  - Schedule Number (SCH.O"SCH.N)36
- Demand Limit36
- Linkage36
- Alarm Handling37
Troubleshooting37
- Alarm Relay Output37
- Alarms and Alerts37
- CCN Alarm Broadcast37
- Complete Unit Stoppage37
- Restart Procedure37
  - Alarms"Curr (Currently Active Alarms)38
  - Alarms"Hist (Alarm History)38
  - Alarms"R.hist (Reset Alarm History)38
  - Diagnostic Alarm Codes and Possible Causes38
  - Alert Code T075 − Supply Air Temperature Thermistor Failure39
  - Alert Code T076 − Return Air Thermistor Failure39
  - Alert Code T077 − Space Relative Humidity Sensor Failure39
  - Alert Code T080 − Circuit C Saturated Condensing Temp Thermistor Failure39
  - Alarm Code A154 − Serial EEPROM Hardware Failure40
  - Alarm Code A156 − Critical Serial EEPROM Storage Fail Error40
  - Alarm Code T153 − Real Time Clock Hardware Failure40
  - Alarm Code T155 − Serial EEPROM Storage Failure Error40
  - Comfortlinkt Alarm Codes41
  - Alert Code T41043
  - Alert Code T41143
  - Alert Code T412 – Thermostat W2 Input Activated Without W1 Activated43
  - Alert Code T413 – Thermostat y and W Inputs Activated Simultaneously43
  - Fan Status Switch Off/Fan Contactor on43
  - Alert Code T415-41844
- Communication Failures44
- Control Module Communication44
  - Green LED44
  - Red LED44
  - Cooling Service Analysis45
- Cooling Troubleshooting45
- Humidi-Mizer Service Analysis46
- Humidi−Mizert Troubleshooting46
- Economizer Service Analysis47
- Economizer Troubleshooting47
  - Electric Heat (50PG Units)48
  - Gas Heat (48PG Units)48
  - Gas Heating Service Analysis48
- Heating Troubleshooting48
  - IGC Service Analysis Logic49
  - Electric Heat Service Analysis50
  - IGC Board LED Alarm Codes50
- Phase Loss Protection51
  - Phase Reversal Protection51
  - Refrigerant Temperatures51
- Thermistor Troubleshooting51
- Forcing Inputs and Outputs52
  - Saturated Condensing Temperature Thermistor Location — 48/50PG03−0752
  - Sensor Trim52
- Transducer Troubleshooting52
  - Temperature (_F) Vs Resistance/Voltage Drop Values for OAT, SAT, and SPT Thermistors (10K at 25_C Type II Resistors)53
  - Temperature (_F) Vs. Resistance/Voltage Drop Values for SCT Sensors (5K at 25_C Resistors)54
- General55
  - Pressure (Psig) Vs. Voltage Drop Values for Suction Pressure Transducers55
  - 48PG03−16 Control Wiring Schematic56
  - 50PG03−16 Control Wiring Schematic57
  - Typical 48/50PG03−14 Power Wiring Schematic and Legend (48/50PG08−14 Shown)58
  - Typical 48PG03−16 with Humidi−Mizert System Control Wiring Schematic(48PG08−16 Shown)59
  - Typical 50PG03−16 with Humidi−Mizert System Control Wiring Schematic(50PG08−16 Shown)60
  - Typical 48/50PG03−14 with Humidi−Mizert System Power Wiring Schematic and Legend61
  - Typical 48PM16−28 Control Schematic62
  - Typical 48PM16−28 with Humidi−Mizert System Control Schematic63
  - Typical 50PM16−28 Control Schematic64
  - Typical 50PM16−28 with Humidi−Mizert Control Schematic65
  - Typical 48/50PM16−28 Power Schematic66
  - Typical 48/50PM16−28 with Humidi−Mizert System Power Schemati67
  - Typical 48/50PG03−16 Unit Component Arrangement (Sizes 03−07 Shown)68
  - 48/50PM16−28 Component Arrangement69
  - 48/50PM16−28 with Humidi−Mizert Component Arrangement70
- Main Base Board (MBB)71
- MBB Connections72
- Economizer Control Board (ECB)73
  - ECB Connections74
  - IGC Connections75
- Integrated Gas Control (IGC) Board75
- Field Connection Terminal Strip76
- Low Voltage Terminal Strip (TB1)76
- Accessory Navigatort Display77
- Carrier Comfort Network (CCN)R Interface77
- Scrolling Marquee Display77
- CCN System Architecture78
- Energyx78
- Field-Installed Accessories79
  - Space Temperature Sensor (T−55)79
  - Space Temperature Sensor (T−56)79
  - Space Temperature Sensor (T−58)79
  - Space Temperature Sensor Averaging80
  - Space Temperature Sensor Averaging with 3 T−55 Sensors and One T−56 Sensor80
  - Carrier Accessory Kits81
  - Indoor Air Quality81
  - Outdoor Air Quality81
  - Two−Position Damper81
- Cleaning82
  - Coil Maintenance and Cleaning Recommendation82
  - Space Humidity Sensor82
Major System Components55
Service82
- Condensate Drain Pan (48/50PG03−14 Units)83
- Routine Cleaning of Round−Tube Coil Surfaces83
- Condensate Drain Pan (48/50PM16−28 Units)84
- Filters84
- Lubrication84
  - Main Burner (48PG and PM)84
  - Condenser and Evaporator−Fan Motor Bearings85
  - Economizer or Manual Outside Air Damper85
- Evaporator Fan Service and Replacement85
- Evaporator−Fan Motor Adjustment85
- Evaporator Fan Belt Tension Adjustment86
- Condenser-Fan Adjustment87
- Economizer Operation During Power Failure87
- Evacuation87
- NOVATION Heat Exchanger Condenser Service and Replacement87
- Verify Sensor Performance87
  - Low Charge Cooling88
  - No Charge88
- Refrigerant Charge88
  - Triple Evacuation Method88
  - Charging Chart — 48/50PG0589
  - Charging Chart — 48/50PG0689
  - Charging Chart — 48/50PG0789
  - Charging Chart — 48/50PG08 and 0989
  - Charging Chart — 48/50PG1290
  - Charging Chart — 48/50PG1490
  - Charging Chart − 48/50PM16 and 2090
  - Charging Chart − 48/50PM2490
  - Altitude Compensation91
  - Gas Valve Adjustment (48PG and PM)91
  - Puronr Refrigerant91
  - Typical Gas Valve (20−28 Sizes Shown)91
  - High Altitude (48PG and PM)92
- Main Burners (48PG and 48PM)92
  - Natural Gas92
  - Propane Gas92
- Control Circuit, 24−V93
- Diagnostic Leds93
- Energyx93
- Filter Drier93
- Protective Devices93
- Relief Devices93
- Replacement Parts93
Appendix A - Local Display and Ccn Tables94
- Mode — Time Clock108
- Mode — Operating Modes109
- Single-Circuit Units112
- Dual Circuit Units112
APPENDIX B − CONTROL MODES with Humidi−Mizert SYSTEM and ECONOMIZER112
Appendix C - Start−Up Data113
Appendix D - Additional Start−Up Data169
Mode — Configuration180
Control Set Point and Configuration Log180
Indicate Unit Settings below180
Pre-Start-Up188
Unit Start-Up Checklist188

Brand	Carrier
Model	48/50PG C03-14
Category	Air Conditioner
Language	English

Carrier 48/50PG C03-14 User Manual

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