A.O. Smith ADMR - 40 Installation, User And Service Manual page 75

Symptom Cause
E01 (blocking error) The temperature of the
water at the top of the
tank is > 85 °C.
The temperature
protection at the top of
the tank has been
activated.
E03 (lock-out error) The two temperature
sensors in the tank
detect a differential of >
Error in temperature
10 °C over a period of
sensor T at the top of
1
at least 60 seconds.
the tank.
E04 (lock-out error) The two dummy
sensors in the tank
detect a differential of >
Error in dummy
(2)
10 °C over a period of
sensor .
at least 60 seconds.
(1) Temperature sensor T is a '2 in 1' sensor: T
1
(2) The flue gas sensor comprises flue gas sensor 1 and flue gas sensor 2.
Instruction manual ADMR
Solution
None. This is a temporary message that may appear from time to
time, but will disappear automatically.
1. Check sensor position and wiring.
2. If necessary, reset the electronic controller. Replace the sensor
if the error persists.
1. Check leads from dummy 1 and dummy 2.
2. If necessary, reset the electronic controller. Replace the dummy
sensor if the error persists.
, contains 2 NTCs for maximum thermostat and safety thermostat protection.
1
Remark
To replace the necessary parts, you must contact your installation
engineer
To replace the necessary parts, you must contact your installation
engineer
is
75