Manitowoc 8500-1 - Fault Detection from the Control Panel Indication; General; Fault in the Input and Output Circuit of the Motor Actuator; Fault in the Thermistor Sensor Circuit

Reference Only
11. AIR CONDITIONER
Published 08-16-13, Control #208-03 11-19 8500-1/8500E-1
11.4 FAULT DETECTION FROM THE CONTROL PANEL INDICATION
11.4.1 GENERAL
11.4.2 FAULT IN THE INPUT AND OUTPUT CIRCUIT OF THE MOTOR ACTUATOR
OPEN CIRCUIT DETECT INDICATION
MOTOR LOCK DETECT INDICATION
11.4.3 FAULT IN THE THERMISTOR SENSOR CIRCUIT
OPEN CIRCUIT DETECT INDICATION
When there is any fault in the input circuit of the control-
ler of the motor actuator drive line or each sensor, fault
detection is indicated.
Once the fault is detected, fault detection is not reset
even the fault returns to normal.
Turning the vehicle’s main key switch is turned to OFF,
then the fault is reset.
1. OPEN CIRCUIT DETECTION
If there is an open circuit or short circuit in the motor
actuator line, open circuit detection is indicated.
FAULT LOCATION FAULT INDICATION
AIR MIX (TEMPERATURE CONTROL) HOT MARK BLINKING
2. MOTOR LOCK DETECTION
If the motor speed does not reach the target, LOCK
is detected and motor output is ceased and motor
lock detection is indicated.
FAULT LOCATION FAULT INDICATION
AIR MIX (TEMPERATURE CONTROL) HOT MARK BLINKING
IN-OUT AIR MOTOR ACTUATOR IN-OUT AIR MARK BLINKING
1. OPEN OR SHORT CIRCUIT
Open circuit detect is indicated when there is an
open or short circuit in the sensor line.
FAULT LOCATION FAULT INDICATION
EVAPORATOR SENSOR AIR CON. MARK BLINKING