Unit Test Mode; Sequence Of Unit Test Mode; Fault Reporting; Clearing Faults - Trane 7 Series Field Reference Data

Unit Test Mode

Unit Test Mode will exit if any demand is given to the unit.
To enter Unit Test Mode:
1. Set System Switch on comfort control to Off
2. Cycle power to the unit, wait 5 seconds
3. Within thirty seconds, press and hold the Unit Test But-
ton for 1-2 seconds

Sequence of Unit Test Mode

1. EVC drives the EEV motor to the 1st stage position for
5 seconds
2. EVC drives the EEV motor to the 2nd stage position for
5 seconds
3. AFC energizes the blower at 50% and then continues
to ramp until it reaches 100% cooling airflow. Humidifier
contacts close when the blower starts
4. EHC energizes the W1, W2, and W3 circuit relay(s) for
5 seconds in 5 second intervals
5. 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:
1. Press and hold the Unit Test Button for 10-12 seconds.
2. Release the Unit Test button and "wait" 5 seconds.
3. Cycle 230VAC power to the unit. (the blower panel can
be removed to achieve this)
Unit Test Button
TRANE U.S. INC.
J1
T1
J8
D10
1
R28
J9
Y1
O
B
Yo
R
R63
Yo Jumper
STATUS
W2
UNIT R66
Q8
FAULT
K2
R70
D28
R80
R73
Airflow Control (AFC)
TAM7­6
HUM J4
PART NO. LABEL
C7
T2
C3 C37
D1 R19
R5
R12
R7
C2
D2
R2
C6
BAR CODE R21
D7 D4
K1
R42
D6 D3
Q1
R25 R18
C17 C16 D5 C5 C4
D11 D8 R39 R33
R24 R17 R40
R10 R43
C23 R46
R9 U2
R26 R27 R11 R15
R16
R41 R57 R58
C25 16 1
D12
D30
C24 17 64
C44
C45 D31
D13 C36
C31 R23
R38 R32 R36 R20
R85 R82 R84
32 49
D15 C27 C26 D18 C35
D16 C29 C30 D19
33 48 R65 R64
C43
X1
R78 R76
R45 R49 R52 R54
R50 R55
R86
D20 R69 R72 R71
R75
C33 C32 D21
D26 C41 D27 C49
R56 D29
R62 R74 C59
C48 R97
C46
B K Jumper
R109
W1
R106 D36
D24
U4
C53
D35
R102
R68
D33 C52 C47
C40
R101
U3 L2
R110
R94 C58
R104
R100
C39 R67 C38 C51
D32 D23
L3
J6
S3
+13.8V
TEST
OU
Pb
HP
1
1
R4
R3
R8
R NET
C1
R34 R NET 2
R1
U1
R13
R14
J3
C42
R77 Q3
Q
R79
R83
R47
R81
R37
Q6
R5
R61
R91 R98
R89
Q7
R105
C60
R103
TZ2
R95
C54
R99 R96
C57
C50
MOV1