Carrier 50HCQA Installation Manual Page 69
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69
Table 25 – Central Terminal Board (CTB) Connections
CONNECTION
LABEL
PIN NUMBER POINT DESCRIPTION 24Vac FROM 24Vac TO
DDC
T’STAT
7 Compressor 1 Call MBB ECON
6 Compressor 2 Call MBB ECON
5 Heat Stage 1 Call MBB CONTL BOARD
4 Heat Stage 2 Call MBB CONTL BOARD
ECON
1,2 Comp 1 Call jumper DDC T’STA T CLO1/COMP1
3,4 Comp 2 Call jumper DDC T’STA T CLO2/COMP2
CLO1/
COMP1
3 Comp 1 Contactor Common CTB C C1 --- Coil
4,5 Comp 1 Jumper ECON CIRCUIT 1 LPS
6 Comp 1 Contactor Signal CIRCUIT 1 HPS C1 --- Coil
CLO2/
COMP2
3 Comp 2 Contactor Common CTB C C1 --- Coil
4,5 Comp 2 Jumper ECON CIRCUIT 2 LPS
6 Comp 2 Contactor Signal CIRCUIT 2 HPS C1 --- Coil
7 ODF Contactor Signal ECON OFC1 --- Coil
CIRCUIT 1
HPS Comp 1 High Pressure Switch CIRCUIT 1 LPS CLO1/COMP1
LPS Comp 1 jumper CLO1/COMP1 CIRCUIT 1 HPS
CIRCUIT 2
HPS Comp 2 High Pressure Switch CIRCUIT 2 LPS CLO2/COMP2
LPS Comp 2 jumper CLO2/COMP2 CIRCUIT 2 HPS
CONTRL
BOARD
2 Heat Stage 2 Call DDC T’STA T Gas Valve or PL3
3 Heat Stage 1 Call DDC T’STA T I G C --- W o r P L 3
4 IGC C ommon/Ground CTB C IGC C
5 Transformer 1 Common/Ground TRAN1 Common CTB C
6 IGC Call for Indoor fan IGC IFO CONTL BOARD
7 IGC Call for Indoor fan CONTL BOARD MBB
8 IGC power (T1J9) CTB R IGC R
9 Transformer1Power(T1J1) TRAN1 24Vac UNIT SHUTDOWN
10 Indoor Fan overload signal (T1J9) Fan overload CTB R
11 Indoor Fan overload source (T1J8) PMR Fan overload
PMR
1 Ground CTB C PMR Device
2 Phase Monitor Source (T1J6) UNIT SHUTDOWN PMR Device
3 Phase Monitor Normally Closed Signal (T1J7) PMR Device CONTL BOARD
UNIT
SHUTDOWN
REMOTE
SHUTDOWN
Remote Disable Switch if installed (T1J4 and
T1J5)
SMOKE SHUTDOWN PMR
SMOKE
SHUTDOWN
Normally Closed Smoke Detector Contact (T1J3) Smoke Detect or REMOTE SHUTDOWN
24V OUT Smoke Detector Controller Power (T1J2) CONTL BOARD Smoke Detector
C Smoke Detector Controller Common CTB C Smoke Detector
R Spades Transformer1PowerafterSafetyChain(T1J9) CONTL BOARD
C Spades Ground CONTL BOARD
The References above for T1J1 through T1J9 are to show the path of transformer 1 as is goes through the board and safety devices.
ComfortLINK v2.X
- 48/50HC 04---28 1
- Single Package Rooftop Units 1
- SAFETY CONSIDERATIONS 2
- BASIC CONTROL USAGE 3
- Accessory Navigator Display 4
- Operation 4
- CCN Tables and Display 4
- Force Hierarchy 5
- Generic Status Display Table 5
- START-UP 6
- Condenser Fans and Motors 7
- Return--Air Filters 7
- Outdoor--Air Inlet Screens 7
- Accessory Installation 7
- Orifice Change (48HC) 7
- Gas Heat (48HC) 8
- Economizer 9
- SERVICE TEST 12
- THIRD PARTY CONTROL 13
- CONTROLS OPERATION 14
- General Operation 15
- Occupancy Determination 16
- Cooling Mode Control 18
- Staging Control 18
- Compressor Control 19
- Outdoor Fan Control 19
- Heating Mode Control 19
- Heat Relay Control 20
- Economizer Position % 21
- Fan Speed % 21
- Free Cooling 22
- Thermostat Control 22
- Space Sensor Control 22
- Unoccupied Free Cooling 22
- Power Exhaust (CV units) 22
- Power Exhaust (SAVt units) 23
- IAQ (Analog Input) 23
- IAQ (Switch Input) 24
- Fan Enable (Switch Input) 24
- Dehumidification Demand 25
- Reheat Modes 25
- Temperature Compensated Start 29
- Carrier Comfort Network (CCN) 30
- Configuration 30
- Demand Limit 30
- TROUBLESHOOTING 31
- Complete Unit Stoppage 32
- Restart Procedure 32
- Alarms and Alerts 32
- MBB --- Main Base Board 37
- Green LED 39
- Yellow LED 39
- Cooling Troubleshooting 40
- Economizer Troubleshooting 42
- Heating Troubleshooting 43
- IDM – Induced-Draft Motor 44
- “AUTO” position 44
- Phase Loss Protection 46
- Thermistor Troubleshooting 46
- CIRCUIT “B” 49
- CIRCUIT “A” 49
- Transducer Troubleshooting 50
- Forcing Inputs and Outputs 50
- MAJOR SYSTEM COMPONENTS 53
- RED LED - STATUS GREEN LED 62
- LEN (LOCAL EQUIPMENT NETWORK) 62
- YELLOW LED 62
- CCN (CARRIER COMFORT NETWORK) 62
- INSTANCE JUMPER (SET TO 1) 62
- RED LED-STATUS 66
- 48/50HC 04--14 Units — 67
- 48/50HC 17--28 Units — 68
- Central Terminal Board (CTB) 68
- Scrolling Marquee Display 70
- Accessory Navigatort Display 70
- Interface 70
- Protective Devices 72
- Field-Installed Accessories 72
- MODE — RUN STATUS 75
- MODE — RUN STATUS (cont) 76
- MODE — SERVICE TEST 78
- MODE — TEMPERATURES 78
- MODE — PRESSURES 78
- MODE — INPUTS 79
- MODE — OUTPUTS 79
- MODE — SET POINTS 79
- MODE — CONFIGURATION 80
- MODE — TIME CLOCK 85
- CCN ONLY TABLES 85
- MODE — OPERATING MODES 86
- MODE — OPERATING MODES (cont) 87
- MODE — ALARMS 89
- VFD Diagnostics 95
- Table 32 — FAULT CODES (cont) 96
- Table 33 – ALARM CODES 97
- INDICATE UNIT SETTINGS BELOW 98
- MODE — CONFIGURATION (cont) 100
- ComfortLINK v2.X 100
- ELECTRICAL 103
- TEMPERATURES 103
- PRESSURES 103
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