Fault Reporting - Trane AM7A0C36H31SA Service Facts

Unit Test Mode
Unit Test Mode will exit if any demand is given to the unit.
To enter Unit Test Mode:
1. Shut System Switch on comfort control to Off
2. Power cycle unit power, wait 5 seconds
3. Press and hold the Unit Test Button for 1-2 seconds
Sequence of Unit Test Mode
4. EVC drives the EEV motor to the 1st stage position for 5
seconds
5. EVC drives the EEV motor to the 2nd stage position for 5
seconds
6. AFC energizes the blower at 50% and then continues
to ramp until it reaches 100% cooling airflow. Humidifier
contacts close when the blower starts
7. EHC energizes the W1, W2, and W3 circuit relay(s) for 5
seconds in 5 second intervals
8. All relays de-energize and the blower shuts off after five
seconds.
If a fault occurs during the Unit Test Mode, the LED will flash
the code and continue the test

Fault Reporting

This unit stores the last four faults that have occurred. Each
device will report the last four faults after each power
cycle of the unit. See the Fault Table section in the
Service Facts for a list of fault codes
Clearing Faults
To clear the last four faults of all control boards, press and
hold the Unit Test Button for 10-12 seconds.
SUBCOOLING AdJUSTMENT
The following combinations should be charged to 8
degrees sub-cooling to maintain rated HSPF.
Indoor Unit Model No.
*AM7A0C36H31SA
* May be "A" or "T"
All other non-rated matches must be charged per the
nameplate charging instructions.
Outdoor Unit Model No.
4A6B4036E1
4A6H5036E1
4TWB4036E1
4TWR5036E1
Unit Test Button
TRANE U.S. INC.
J1
T1
J8
D10
1
R28
D30
J9
Y1
R85
O
D15
B
Yo
R50
D20
R
R63
Yo Jumper
STATUS
W2
UNIT R66
Q8
FAULT
K2
R70
D28
R80
R73
Airflow Control (AFC)
5
HUM J4
PART NO. LABEL
C7
T2
C3 C37
R5 D1 R19
R12
R7 C2
D2
R3
R2 R8
C6
BAR CODE R21
D7 D4
K1
R42 R34
D6 D3
Q1
D5 R25 R18
C17 C16 C5 C4
D11 D8 R39 R33
R24
R17 R40
R10 R43
C23 R46
R9
U2
R26 R27 R11 R15
R16 R41
16 1 R57 R58
D12 C25
C24 17 64
C44
C45 D31
D13 C36
C31 R23
R84 R38 R32 R36 R20
R82
32 49
C27 C26 D18 C35
D16 C29 C30 D19 48 R65 R64
33
C43
X1
R78 R76
R45 R49
R52 R54
R55
R86
R69 R72 R71
C33 C32 R75
D21
R91
C41
D26 D27 C49
R56 D29
R62 R74 C59
C48 R97
B K Jumper C46
R109
W1
R106 D36
D24
C53 U4
D35
R68 R102
D33
C52 C47
C40
R101
U3 L2
R110
R94 C58
C50
R104 MOV1
R100
C39 R67 C38 C51
D32 D23
L3
J6
S3
+13.8V
TEST
AM7A0C36H31-SF-1A
OU
Pb
HP
1
1
R4
R NET
C1
R NET 2
R1
U1
R13
R14
J3
C42
R77 Q3
Q
R79
R83
R47
R81
R37
Q6
R5
R61
R98
R89
Q7
R105
C60
R103
TZ2
R95
C54
R99
R96
C57