Thermo King 098916, Maintenance Manual

Page: 97 / 196

Operating Instructions
96
Alarm Codes and Actions / Data Menu Display
There are three (3) possible alarm codes that can
be generated if the AFAM+ system is not working
properly. There is one (1) additional PTI alarm
that could be generated on a unit equipped /
utilizing an O2 sensor.
Alarms Possible Cause Corrective Action(s)
Code 57
AFAM Control Module or
Motor Error
1. Vent door is frozen or stuck 1. Visually inspect door for ice or
obstruction
2. Door linkage adjustment 2. Check for proper linkage
adjustment
3. Incorrect wiring 3. Check wiring connections
4. Defective motor 4. Using Manual Function Test –
AFAM Open or AFAM Close, test
to cycle the door open and closed.
If motor does not move the door,
use independent 12 VDC (battery)
supply to cycle the motor. If motor
does not move with independent
supply, motor is defective
5. Defective control module 5. If motor cycles using independent
12 VDC supply, the control module
is faulty
Code 68
AFAM Gas Analyzer Error
1. Analyzer disconnected 1. Verify analyzer harness is
correctly connected to control
module, to gas analyzer and 9-pin
cable is connected to control
module and controller
2. Incorrect wiring 2. Verify wiring is correct
3. Wrong configuration 3. In Configuration menu, check that
AFAM+ configuration is set
properly
4. Cable plugged into download port
during sampling interval
4. Both the controller download port
and gas analyzer are connected to
the same serial port on the
controller and only one can
communicate at a time. If cable is
plugged into the download port,
the analyzer is disabled and will
not sample. Remove download
cable from serial port
5. Defective analyzer 5. Replace analyzer