OEM DC BWA-SS-7 Installation And Maintenance Instructions Manual page 45

43 Control
Alarm Messages
The cause of alarm 'WARM WATER TEMP.' could be:
1. The connection of water tank temperature sensor was loose;
2. The water tank temperature sensor was broken;
How to do:
1. Find the connection and make sure it is fine;
2. As per resistance table of the sensor, please measure the sensor's resistance, to judge the
sensor was good or bad; replace a new one if the sensor get problem.
The cause of alarm 'FEEDLINE TEMP.' could be:
1. The connection of feed water temperature sensor was loose;
2. The feed water temperature sensor was broken;
How to do:
1. Find the connection and make sure it is fine;
2. As per resistance table of the sensor, please measure the sensor's resistance, to judge the
sensor was good or bad; replace a new one if the sensor get problem.
The cause of alarm 'RETURN TEMP.' could be:
1. The connection of return water temperature sensor was loose;
2. The return water temperature sensor was broken;
How to do:
1. Find the connection and make sure it is fine;
2. As per resistance table of the sensor, please measure the sensor's resistance, to judge the
sensor was good or bad; replace a new one if the sensor get problem.
The cause of alarm 'PIPE TEMP.' could be:
1. The connection of pipe temperature sensor (on evaporator, for defrosting) was loose;
2. The pipe temperature sensor was broken;
How to do:
1. Find the connection and make sure it is fine;
2. As per resistance table of the sensor, please measure the sensor's resistance, to judge the
sensor was good or bad; replace a new one if the sensor get problem.
The cause of alarm 'OUTDOOR TEMP.' could be:
1. The connection of outdoor ambient temperature sensor was loose;
2. The outdoor ambient temperature sensor was broken;
How to do:
1. Find the connection and make sure it is fine;
2. As per resistance table of the sensor, please measure the sensor's resistance, to judge the
sensor was good or bad; replace a new one if the sensor get problem.