34IGNITION PROVING FAULT - Control will try three more times before a lockout #14 occurs. Check for: - Gas valve defective or gas valve turned "OFF".
- Defective Hot Surface Ignitor | - Manual valve |
- Low inlet gas pressure | - Flame sensor must be ungrounded. |
-Green wire MUST be connected to furnace sheet metal.
-Proper flame sense microamps (.5 microamps D.C. minimum, 4.0 - 6.0 nominal in HIGH HEAT)
- Inadequate flame carryover or rough ignition.- Control ground continuity - Oxide buildup on flame sensor (clean with fine steel wool.)
41BLOWER OUTSIDE VALID SPEED RANGE - Indicates the blower is not operating at the calculated RPM. If this fault occurs in conjunction with fault #44 check wiring to motor otherwise refer to
the
42INDUCER OUTSIDE VALID SPEED RANGE - Indicates the inducer is not operating at the calculated RPM, or has not started within 10 seconds after a call for heat. Check wiring to motor otherwise refer to the
43PRESSURE SWITCH CALIBRATION FAULT- Indicates the low and high pressure switch "make" points during high heat purge are not within the calibration range.
Check for: | - Plugged condensate drain. |
-Water in vent piping, possibly sagging pipe.
-Improper pressure switch wiring or pressure switch tubing connections.
-Failed or "Out of Calibration" pressure switches.
44BLOWER CALIBRATION FAULT - Indicates the calculated blower speed is below 250 or above 1300 RPM. Unit will default to low or high heat mode if possible. If this fault occurs in conjunction with fault #41 check wiring to motor otherwise refer to the
STATUS CODE EXAMPLE
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| RED LED2 |
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| EMER HEAT |
| MICROPROCESSOR |
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| MALFUNCTION |
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SETUP | OFF | 1 |
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OFF OFF 2 3 4 5 6 7 8 | 1 2 3 1 2 3 |
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3 | DEHUM |
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4 | FUSE | DE | W2 | COM | W/W1 Y/Y2 | R | G | ||||
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| 24 V |
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YELLOW LED3 |
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HIGH HEAT |
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GREEN LED4 | (4) | (2) = | 42 FAULT | ||||||
LOW HEAT |
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| INDUCER OUTSIDE VALID |
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COMPONENT TEST
To initiate the component test sequence, shut "OFF" the room thermostat or disconnect the "R" |
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thermostat lead. Put setup switch | . | |
Once initiated the main board will turn "ON" the inducer |
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hot surface ignitor, blower |
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When component test is completed one or more of the following codes will flash. Gas Valve and |
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Humidifier will not be turned on. |
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CODE | DESCRIPTION |
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11Indicates inducer and blower motor tested OK. Visual check of hot surface ignitor required.
22SETUP ERROR - Same as code 22 above.
41BLOWER OUTSIDE VALID SPEED RANGE - Indicates blower motor failed test. Check blower, wiring, and control center.
42INDUCER OUTSIDE VALID SPEED RANGE - Indicates inducer motor failed test. Check inducer, wiring and control center.
To repeat component test turn setup switch
320624-101 REV. J
A99243
A99243b
→Fig. 4ÐService Label/Fault Code Instructions
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