Ecm Specific Replacement Parts; Ecm Troubleshooting; Diagnostic Features - Thermo Pride OH5-85DE Operation Manual

All installations and services must be performed by qualified service personnel.
OH5 2-STAGE
SW1
SETTING TONS COOL
6 OFF
5 OFF
2
4 ON
6 OFF
5 OFF 2.5
4 ON
6 OFF
5 ON 3
4 ON
6 ON
5 OFF
3.5
4 OFF
6 ON
5 OFF 4
4 ON
Factory shipped
settings
G. ECM SPECIFIC REPLACEMENT PARTS
Part Name
ECM Motor
Control Board
Motor Power Harness
Motor Control Harness
Burner Harness
Transformer
III. ECM TROUBLE SHOOTING
A. DIAGNOSTC FEATURES
The control board is equipped with 4 green Input Status LEDs and 1 red Board Status LED. These are intended to
provide a quick view into furnace performance without requiring a voltmeter.
The green Input Status LEDs are driven by the "Y", "W", "G", and "DEHUM" inputs and are located directly
below those inputs. They will light to indicate the presence of these signals.
CFM
LOW
726 352
924 462
1276 638
1474 726
1600 814
OH5/OH2 OH11
AOPS7443/ AOPS7444
AOPS7449
350915 350915
350917 350917
350920 350920
350916 350916
350464 350464
SW1
SETTING
3 OFF
2 ON
1 OFF
3 OFF
2 ON
1 ON
3 ON
2 OFF
1 OFF
OL5/OL2 OL11
AOPS7445/ AOPS7446
AOPS7450
350915 350915
350918 350918
350921 350921
350916 350916
350464 350464
13
OH5 2-STAGE
HIGH FIRE
LOW FIRE CFM
CFM RISE RISE
800 81 1008
905 72 1121
960 68 1200
OH5
OC5/OC2
2-STAGE
AOPS7448/ AOPS7454
AOPS7447
350915 350184
350917 350917
350920 350183
350928 350182
350464 350464
78
70
66