Trane AM7A0C36H31SA - EVC Status and Fault Codes; EVC Status LED Indications; EVC Fault Code Descriptions

13 AM7A0C36H31-SF-1A
EVC FAULT CODES
EVC STATUS LED (Non Heat Pump Systems)
Flash
1 Cool mode / No active call
2 Active call for 1st stage cooling
3
A
ctive call for 2nd stage cooling
NOTE: Single stage OD systems will report 2nd stage flash codes
EVC STATUS CODES
EVC STATUS LED (Heat Pump Systems)
Flash
1 Cool mode / No active call
2 Active call for 1st stage cooling or defrost
3 Active call for 2nd stage cooling or defrost
4 Heat mode selected or System switch off
5 Active call for 1st stage heating
6
A
ctive call for 2nd stage heating
NOTE: Single stage OD systems will report 2nd stage flash codes
Unit LED
1 Flash Normal
Rapid Communication Busy Error
Off No power
EVC
Fault LED Description
OFF No Fault
1 Stepper Motor coil has an open circuit or intermittent short (Replace coil)
2
Control has detected an internal failure (Replace EEV control, EVC)
3
Saturated Gas Sensor input out of range (Verify resistance, 5VDC output from control)
(1)
4
Evaporator Gas Sensor input out of range (Verify resistance, 5VDC output from contro
l
(1)
5
Stepper Motor Coil is shorted (Replace coil)
(2)
6
Valve is not responding to a change in position. (Possible stuck valve)
7
High superheat (Low charge or restriction)
10
Low superheat (Check airflow, possible stuck valve)
(3)
11
Condensate drain switch activated for 100 seconds (Check condensate switch and drain
(2)
13
Indoor frost protection activated (Check refrigerant charge and airflow)
(2)
14
Internal communication error (All OD operation is terminated)
15
Configuration fault (All operation is terminated) (Cycle power & check if PM error is present)
16
Outdoor status fault (All operation is terminated)
(4)
1) EEV will try to go to a safe position, cooling attempt allowed
2) K1 relay opens on EVC, Yo disabled
3) Cooling attempt allowed, 5 consecutive Y calls with same condition disables Yo
4) Any internal communication wire broken/disconnected will trigger error the fault and all OD operation
will be terminated. EHC will operate normally.
FAULT
R80
R70
D
D28
R73
R100
K2
J4
TEST
CLOSE
410
FAULT
UNIT
22
OPEN
STATUS
FAULT
OFF
ON
STATUS
LED
FAULT
LED
UNIT
LED