ATC M910165 Operator Instructions Download Page 2

Setpoint changes 

 

Press 

 or 

  to adjust the setpoint temperature. The 

current temperature will

 

blink once, before it increases or 

decreases depending on which arrow key is pressed 

 

Manual Defrost 

 Press the 

 key for 

3 seconds

 to 

attempt

 a 

manual defrost 

 

Alarm Codes 

 

Code 

Description 

Action 

ADT 

Above defrost temperature 

Evaporator temperature is too high for defrost

 

BLK 

Setpoint Changes Blocked 

Manual setpoint changes are disabled

 

CF 

Communication failure 

Problem between controller & module communication.

 

Door open 

Buzzer ON until the cargo area door is closed

 

HPF 

High pressure failure 

Compressor off until high-side pressure decreases

 

LPF 

Low pressure failure 

Compressor off until low-side pressure increases

 

SBY 

Electric stand by connected 

Wall plug connected while ignition is ON

 

HTF 

High pressure transducer fault 

High pressure transducer signal lost

 

LTF 

Low pressure transducer fault 

Low Pressure transducer signal lost

 

RTO 

Return temperature sensor open 

System will continue to operate with temperature control 

following back-up open loop 

RTS 

Return temperature sensor short circuit 

EVO 

Evaporator coil temperature sensor open 

Defrost control will only allow manual defrosts (user 

requested) and will continue to perform defrosts based on 

time (

MaxRef.Tm

EVS 

Evaporator coil temperature sensor short 

circuit 

 

 

              

 

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