Carrier 50HCQA Installation Manual Page 36
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36
Alert Code T416 -- OAQ Input Out of Range
This alert occurs when the OAQ input (on ECB) is less than 3.5
mA and the sensor is configured as installed. OAQ operation will
be disabled. Check sensor and wiring. This alert clears
automatically.
Alert Code T418
There are 4 different alerts under this one alert code. Pressing enter
and esc on the marquee or navigator to expand the T418 alert will
show you one of the below alerts. All these alerts are generated by
the OAU device and reported to the MBB. These alerts can only
occur if the Outdoor Air Unit Type (Configuration OAU
OA.TY) is not set to 0. Control action is only taken on the OAU
side and these alerts will reset automatically when the OAU clears
them. Refer to the EnergyX Supplemental Installation Instructions
for more information on these alarms.
S OAU Motor Failure
This alert occurs when the OAU Motor Failure Alarm
(Operating Modes OAU ALM.1) is on. This is usually
due to motor status reporting a failure on the OAU.
S OAU Dirty Filter
This alert occurs when the OAU Dirty Filter Alarm (Operating
Modes OAU ALM.2) is on. This is usually due to filter
status reporting a dirty filter on the OAU.
S OAU Low CFM
This alert occurs when the OAU Low CFM Alarm (Operating
Modes OAU ALM.3) is on. This is usually due to OAU
not capable of achieving proper CFM. If unit is equipped with a
VFD on the indoor fan, the configuration OAU Fan Boost
Enable is set to yes (Configuration OAU EFBE = Yes),
and this alarm is active for 10 minutes, the fan will be
commanded to the next highest configured fan speed. If this
alarm is still active after another 10 minutes, the fan will again
change to the next highest configured fan speed, and so on every
10 minutes until the maximum speed is commanded. The fan
will stay at this override commanded speed until this alarm
clears and a different function changes the commanded speed.
S OAU General Alarm
This alert occurs when the OAU Alarm (Operating Modes
OAU ALM.4) is on. Refer to the specific OAU
documentation for details.
Alert Code A420 -- Supply VFD Fault
This alarm occurs when the VFD has faulted and communicates it
to the Main Base Board (MBB). The last VFD fault number can be
viewed as VFD1 Last Full code (Run Status
S.VFD
LFC).
Refer to VFD major component section for details on its alarms
and faults. The alarm will shut down the unit if the fan ramps down
to 0%. This alarm will automatically reset or can be reset through
the display.
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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