White Rodgers 1F85-277 Guía para resolver problemas Pagina 59
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DIAGNOSTIC TABLE
Green
LED
Flash
Amber
LED
Flash
Red LED
Flash Error/Condition Comments/Troubleshooting
1 Flame sensed when no flame should be
present
Verify the gas valve is operating and shutting down properly. Flame in burner
assemble should extinguish promptly at the end of the cycle. Check orifices
and gas pressure.
2 Pressure switch stuck closed/ inducer error Pressure switch stuck closed. Check switch function, verify inducer is turning
off.
3 1st-stage pressure switch stuck open/inducer
error
Check pressure switch function and tubing. Verify inducer is turning on the
pulling sufficient vacuum to engage switch.
4 Open limit switch Verify continuity through rollout switch circuit.
5 Open rollout/open fuse detect Verify continuity through rollout switch circuit, check fuse.
6 1st-stage pressure switch cycle lockout if the first stage pressure switch cycles 5 times (open, closed) during one call
for heat from the thermostat the control will lockout. Check pressure switch for
fluttering, inconsistent closure or poor vacuum pressure.
7 External lockout (retries) Failure to sense flame is often caused by carbon deposits on the flame
sensor, a disconnected or shorted flame sensor lead or a poorly grounded
furnace. Carbon deposits can be cleaned with emery cloth. Verify sensor is not
contacting the burner and is located in a good position to sense flame. Check
sensor lead for shorting and verify furnace is grounded properly.
8 External lockout (ignition recycles exceeded
where flame is established and then lost)
Check items for exceeded retries listed above and verify valve is not dropping
out allowing flame to be established and then lost.
9 Grounding or Reversed polarity Verify the control and furnace are properly grounded. Check and reverse
polarity (primary) if incorrect.
10 Module gas valve contacts energized with no
call for heat
Verify valve is not receiving voltage from a short. If a valve wiring is correct and
condition persists, replace module.
11 Limit switch open – possible blower failure
overheating limit
Possible blower failure, restricted air flow through appliance or duct work. Verify
continuity through limit switch circuit and correct overheating cause.
12 Module Ignitor contact failure Fault code indicates the module ignitor contacts are not functioning properly.
Replace module.
Solid Module - internal fault condition Module contacts for gas valve not operating or processor fault. Reset control. if
condition persists replace module.
Rapid Twinning error Check wire connections. If condition persists, replace module.
3 double 2nd-stage Pressure Switch Stuck Open/
Inducer Error
Check pressure switch function and tubing. Verify inducer is turning on and
pulling sufficient vacuum to engage switch.
1 Normal Operation with call for first stage heat Normal operation - first stage
2 Normal Operation with call for second stage
heat
Normal operation - first stage
3 W2 present with no W1 Second stage call for heat on thermostat circuit with no call for first stage.
Verify dip switches are set for two stage thermostat and check thermostat first
stage circuit. Configured for a multi-stage thermostat the Module will not initiate
heating unless first stage call from thermostat is received.
4 Y present with no G call Module will allow cooling to operate with only a "Y signal from the thermostat
but will also trigger this code. Verify thermostat is energizing both "Y" and "G"
on call for cool. Check "G" terminal connections.
Rapid Low flame sense current Low flame sense current is often caused by carbon deposits on the flame
sensor, a poorly grounded furnace or a mis-aligned flame sense probe. Carbon
deposits can be cleaned with emery cloth. Check for improve furnace and
module ground. Verify sensor is located in or very near flame as specified by
the appliance manufacturer.
1 Standby or Call for Cool Normal operation. Waiting for call from thermostat or receiving thermostat call
for cool.
INTEGRATED
FURNACE CONTROLS
21M51U-843
DIAGNOSTIC TABLE
www.white-rodgers.com
182
TECHNICAL HELP
- TECHNICAL HELPINDEX 1
- INDEXTECHNICAL HELP 2
- TYPICAL WIRING1F97-1277 3
- 1F97-1277CONFIGURATION 4
- 1F95-1280CONFIGURATION 6
- 1F95-1291CONFIGURATION 8
- Heat Pump Connections 9
- Heat Pump Systems 9
- 1F95-1277CONFIGURATION 10
- (limited temperature range) 10
- INSTALLER/CONFIGURATION MENU 10
- Remote Sensor Terminals 11
- 1F97-0671CONFIGURATION 12
- TYPICAL WIRING1F95EZ-0671 13
- 1F95EZ-0671 14
- AND CONFIGURATION 14
- TYPICAL WIRING1F95-0671 15
- AND CONFIGURATION 1F95-0671 16
- CONFIGURATION1F95-0671 17
- TYPICAL WIRING 1F95-0680 18
- AND CONFIGURATION1F95-0680 19
- AND CONFIGURATION 1F95-0680 20
- 1F80-0471/1F86-0471 21
- CONFIGURATION AND 21
- TERMINAL OUTPUTS 21
- TYPICAL WIRING DIAGRAMS 22
- 1F83-0471/1F85-0471 23
- CONFIGURATION 24
- 1F83-0422/1F85-0422 24
- * Common connection 25
- TYPICAL WIRING1F85-0477 27
- 1F85-0477 28
- CONFIGURATION1F85-0477 29
- 1F80-0224/1F86-0244 30
- 1F80-0261/1F87-0261 30
- TAPE OFF! 32
- CONFIGURATION MENU 33
- 1F82-261 / 1F89-211 35
- 1E78-151 37
- 1F72-151 38
- 1F79-111 38
- WIRING AND 41
- CONFIGURATION1E65-144 41
- 2 Wire Installation 41
- 4 Wire Installation 41
- Troubleshooting Chart 43
- To + or S1 44
- To S or S2 44
- To - or S3 44
- + Terminals 45
- - Terminals 45
- EVAPORATIVE 46
- HEATING TECH HELP INDEX 47
- MAIN VALVE RELAY 48
- TH PGTH-PG 48
- REDUNDANT PILOT/VALVE 50
- ELECTRICAL SCHEMATIC 51
- 36E WIRING 52
- INFORMATION 52
- FURNACE CONTROLS 55
- 21M51U-843 WIRING 55
- INTEGRATED 55
- OPTION SWITCHES 57
- HEAT MODE 57
- DIAGNOSTIC TABLE 59
- 21M51U-843 59
- 50V51-843 60
- 21V51U-843 65
- FAULT INDEX CHART 66
- 1E1D1C 1F 67
- 1I1H1G 1J 1K 67
- 50A55-843 72
- 50A62-820 75
- 50A65-843 78
- L2 must be grounded 81
- LED Condition 83
- 50D50-842 WIRING 85
- 50D50-843 WIRING 85
- SYSTEM LOCKOUT AND 88
- DIAGNOSTIC FEATURES 88
- FAULT RECALL 89
- FAULT CODE RESET 89
- SILENT OPERATOR CONTROL 90
- BOARD MOUNT 91
- LIMIT CONTROLS 91
- 3L09 OUTLINE 91
- Figure 4 92
- Figure 3 92
- Wiring Instruction Notes 94
- 16E09-101 95
- USER MENU 95
- USER MENU / OPERATION 96
- SPECIAL 97
- TRANSFORMERS AND RELAYS 99
- TECHNICAL HELP 100
- WIRING DIAGRAMS 8A04-1 101
- 8A04-1 Typical Wiring 101
- 1311 Three Wire Zone Valve 102
- 1361 Two Wire Zone Valve 103
- TECH HELP INDEX 104
- INDOOR AIR QUALITY / 104
- ZONING SYSTEMS 104
- SIZING AND OZONE 105
- WHAT AIR CLEANERS DO 106
- AND HOW THEY WORK 106
- PARTS VIEW DIAGRAM 107
- COMFORTPRO 109
- AIR CLEANERS 109
- PARTS LIST 109
- AIR CLEANER 110
- PROGRAMMING OPTIONS 110
- TYPICAL WIRING 112
- DIAGRAMS 112
- REPLACEMENT 113
- HFT2900FP 116
- ZONING SYSTEM DESIGN 117
- MINIMUM POSITION DAMPER 118
- ZONING HEAT PUMPS 118
- ZONING COMMERCIAL SYSTEMS 119
- ZONING versus MULTIPLE UNITS 119
- 78123456 121
- WIRING DIAGRAM 4 – 122
- OPERATION AND WIRING 123
- Leading Air Sensor 123
- CZ-4/CAZ-2 ADDING ZONES 124
- AND TROUBLESHOOTING 124
- INSTALLATION 125
- OPERATION 125
- ZONE PANEL 126
- LEAVING AIR SENSOR (CLAS) 127
- TROUBLESHOOTING 127
- CMM-3UKZONE PANEL 128
- CMM-3U WIRING DIAGRAM 132
- BAROMETRIC RELIEF DAMPERS 133
- LOCATION 133
- CRDS ROUND 134
- SPRING RETURN DAMPERS 134
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