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58MVP instruction manual
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Contents
Main
58MVP Variable-Speed 2-Stage Electronic Condensing Furnace
Troubleshooting Guide
EXAMPLE Start Here Section
Page
Fig. 1Variable Speed Furnace Control
Fig.2Without DE Connection
Fig. 3With DE Connection
START HEREIf a problem exists, the service technician should always begin troubleshooting here.
STATUS LED CODE
SERVICE
COMPONENT TEST
Fig. 4Service Label/Fault Code Instructions
STATUS CODE EXAMPLE
FUSE
Page
Table 1Air Conditioning (A/C) Airflow Setup Switch Position
LEDs 1, 2, 3, or 4 ON SOLID (SOLID means on continuously.)
RED LED2 FLASHINGIndicates line voltage polarity is reversed.
Fault Code 11
NO FAULT IN RECENT HISTORY DISPLAYThis indicates 1 of the following:
Fault Code 12
Page
Fault Code 13
NOTE: Blower access panel must be in place.
NOTE: Torque belly band screw to 80 in.lb (6.7 ft. lb). WARNING: DO NOT OVERTIGHTEN!
Fault Code 14
Fault Code 21
INVALID MODEL SELECTIONPersonality connector PL5 is either not connected or jumpered wrong.
Fault Code 22
Thermostat call with SW-1 ON. Thermostat call with SW-6 ON. SW-1 and SW-6 both ON together.
Fault Code 23
Fault Code 24
SECONDARY VOLTAGE FUSE IS OPENIndicates fuse is open and there is a short in low-voltage wiring.
Table 2Air Conditioning (A/C) Airflow Setup Switch Position
Table 3Continuous Fan (CF) Airflow Setup Switch Position
Table 4Two-Speed AC/HP Airflow Requirements (CFM)
Page
Fault Code 31
Page
Fault Code 32
Fault Code 33
Page
Fault Code 34
IGNITION PROVING FAULTThis fault can indicate 1 of the following:
Fault Code 41
BLOWER OUTSIDE VALID SPEED RANGEThis fault indicates 1 of the following:
Page
Fault Code 42
Fault Code 43
RPM (high) 0.90
Page
Fault Code 44
Page
Appendix A
Board Layout and Schematic
Control Center
Wiring Schematic
LEGEND
SCHEMATIC DIAGRAM (NATURAL GAS & PROPANE)
11. Factory connected when LGPS not used.
9. Blower-off delay, gas heating 90, 135, 180 or 225 seconds, cooling or heat pump 90 sec onds.
Appendix B
Isolation Circuits
Fig. 5Isolation of W/W1 and Y/Y2 Thermostat Circuits
Fig. 6Isolation of Outdoor Unit with a Separate 24-v Supply
0-4 IN. SLOPE GAGE
Appendix D
Quick Motor Test Procedure
Page
Page
Appendix E
Variable-Speed Condensing Furnace Duct Static and Blower Operation
*
Air Delivery Curve 080-14
Air Delivery Curve 040-14
Air Delivery Curves
Air Delivery Curve 060-14
Air Delivery Curve100-20
Air Delivery Curve120-20
A97323
Static Pressure Reading Location Diagrams
Horizontal Right and Left Airflow Total Static Pressure Reading Locations
Attic Horizontal Application
Example 1
Example 2
Duct Static Check Sheet
Appendix F
Quick Reference Information
Appendix G
Thermostat Staging Algorithm
122
VARIABLE SPEED CONDENSING FURNACE ALGORITHM
SERVICE TRAINING