![background image](http://html.mh-extra.com/html/carrier/weathermaster-48p2030-100/weathermaster-48p2030-100_controls-start-up-operation-service-and-troubleshooting_2560338120.webp)
120
T170
Compressor Expansion Board Comm Failure
Compressors A3 and B3 disabled
Automatic
A171
Staged Gas Control Board Comm Failure
Staged gas control disabled
Automatic
T172
Control Expansion Module Comm Failure
All CEM board functions disabled
Automatic
A173
RXB board Communication Failure
Unit shut down
Automatic
A174
EXB board Communication Failure
All EXB board functions disabled
Automatic
A175
Supply Fan VFD Communication Failure
Unit shut down
Automatic
T176
Exhaust Fan VFD Communication Failure
No building pressure control
Automatic
T177
4-20 mA Demand Limit Failure
No demand limiting
Automatic
T178
4-20 mA Static Pressure Reset Fail
No static pressure reset
Automatic
A200
Linkage Timeout Error - Comm Failure
Resorts to local unit setpoints
Automatic
T210
Building Pressure Transducer Failure
No building pressure control function
Automatic
T211
Static Pressure Transducer Failure
No static pressure control
Automatic
T220
Indoor Air Quality Sensor Failure
No IAQ control
Automatic
T221
Outdoor Air Quality Sensor Failure
OAQ defaults to 400 ppm
Automatic
T229
Economizer Min Pos Override Input Failure
Operate without override
Automatic
T245
Outside Air Cfm Sensor Failure
No OA CFM control
Automatic
T246
Supply Air Cfm Sensor Failure
Unit shut down
Automatic
T247
Return Air Cfm Sensor Failure
Unit shut down
Automatic
T300
Space Temperature Below Limit
Alert only
Automatic
T301
Space Temperature Above Limit
Alert only
Automatic
T302
Supply Temperature Below Limit
Alert only
Automatic
T303
Supply Temperature Above Limit
Alert only
Automatic
T304
Return Temperature Below Limit
Alert only
Automatic
T305
Return Temperature Above Limit
Alert only
Automatic
T308
Return Air Relative Humidity Below Limit
Alert only
Automatic
T309
Return Air Relative Humidity Above Limit
Alert only
Automatic
T310
Supply Duct Static Pressure Below Limit
Alert only
Automatic
T311
Supply Duct Static Pressure Above Limit
Alert only
Automatic
T312
Building Static Pressure Below Limit
Alert only
Automatic
T313
Building Static Pressure Above Limit
Alert only
Automatic
T314
IAQ Above Limit
Alert only
Automatic
T316
OAT Below Limit
Alert only
Automatic
T317
OAT Above Limit
Alert only
Automatic
T335
Excess Outdoor Air
Alert only
Automatic
A400
Hydronic Freeze Stat Trip
Unit in emergency mode
Automatic
A404
Fire Shut Down Emergency Mode (fire-smoke)
Unit shut down
Automatic
A405
Evacuation Emergency Mode
Run evacuation mode
Automatic
A406
Pressurization Emergency Mode
Run pressurization mode
Automatic
A407
Smoke Purge Emergency Mode
Run smoke purge mode
Automatic
T408
Dirty Air Filter
Alert only
Automatic
T409
Supply Fan Status Failure
Alert only
Manual
A409
Supply Fan Status Failure
Unit shut down
Manual
A410
Supply Fan VFD Fault
Unit shut down
Manual
A411
Exhuast Fan VFD Fault
Unit shut down
Manual
T414
Damper Not Modulating
Alert only
Automatic
T421
Thermostat Y2 Input On without Y1 On
Run on Y2
Automatic
T422
Thermostat W2 Input On without W1 On
Run on W2
Automatic
T423
Thermostat Y and W Inputs On
No cooling or heating
Automatic
T424
Thermostat G Input Off On a Cooling Call
Turn fan on and cool
Automatic
T430
Plenum Pressure Safety Switch Trip
Alert only
Automatic
A430
Plenum Pressure Safety Switch Trip
Unit shut down
Manual
T431
Motor Starter Protector Trip
Alert only
Automatic
A432
Motor Starter Protector Lockout
No building pressure control
Automatic
T500
Current Sensor Board Failure - A1
Alert only
Automatic
T501
Current Sensor Board Failure - A2
Alert only
Automatic
T502
Current Sensor Board Failure - B1
Alert only
Automatic
T503
Current Sensor Board Failure - B2
Alert only
Automatic
T504
Current Sensor Board Failure - A3
Alert only
Automatic
T505
Current Sensor Board Failure - B3
Alert only
Automatic
T610
Economizer Actuator Out of Calibration
Alert only
Automatic
T611
Economizer Actuator Comm Failure
No economizer functions
Automatic
T612
Economizer Actuator Control Range Increased
Alert only
Automatic
T613
Econ Actuator Overload, Setpt Not Reached
Alert only
Automatic
T614
Econ Actuator Hunting Excessively
Alert only
Automatic
T615
Econ 1 (Outside) Not Economizing When It Should
Alert only
Automatic
T616
Econ 1 (Outside) Economizing When It Should Not
Alert only
Automatic
T617
Econ 1 (Outside) Damper Stuck Or Jammed
Alert only
Automatic
Table 104 — Alert and Alarm Codes (cont)
ALARM OR
ALERT
NUMBER
DESCRIPTION
ACTION TAKEN BY CONTROL
RESET METHOD
Summary of Contents for Weathermaster 48P2030-100
Page 130: ...130 Fig 19 Typical Power Schematic Sizes 040 075 Shown ...
Page 131: ...131 Fig 20 Main Base Board Input Output Connections ...
Page 132: ...132 Fig 21 RXB EXB CEM SCB Input Output Connections ...
Page 133: ...133 Fig 22 Typical Gas Heat Unit Control Wiring 48P030 100 Units Shown ...
Page 134: ...134 Fig 23 Typical Electric Heat Wiring 50P030 100 Units Shown ...
Page 135: ...135 Fig 24 Typical Power Wiring 115 V ...
Page 136: ...136 Fig 25 Typical Gas Heat Section Size 030 050 Units Shown ...
Page 138: ...138 Fig 27 Component Arrangement Size 030 035 Units ...
Page 139: ...139 Fig 28 Component Arrangement Size 040 075 Units ...
Page 140: ...140 Fig 29 Component Arrangement Size 090 100 Units ...