WINTERIZING THE ATEC AT422T
OPERATION AND TROUBLESHOOTING
The Espar seven day timer is located above the carrier cab operator's console, right side. The seven
day timer controls the operation of the Espar engine coolant heater (when installed). The seven day
timer also has the capability to display fault codes generated by the coolant heater control unit.
The seven day timer allows the crane operator to pre-select engine coolant heater on/off cycles up to
seven days in advance. The timer enables manual coolant heater operation.
CONTROLS & INDICATORS
The following paragraphs describe the seven day timer controls and
indicators. The numbers in parentheses ( ) represent the index number
Pushbutton (1). This pushbutton initiates the clock setting sequence.
Pushbutton (2). Selects the desired memory location for one of three possible
Preheat Time Set
stored engine coolant heater on/off sequences.
Pushbutton (3). Turns the engine coolant heater on and off manually.
Pushbutton (4). When pressed, the timer information on the timer display screen
Pushbutton (5). When pressed, the timer information on the timer display screen
Memory Location Display (6). Indicates the current memory location (1-2-3).
Time and Day Display (7). Indicates the day of the week MO (Monday), TU (Tuesday), etc., and the
current time (24-hour clock).
Heater On Symbol (8). Symbol appears when the engine coolant heater is operating (preheat or heat
Figure K-1. Espar Coolant Heater Seven
Day Timer Controls and Indicators