A.O. Smith SGS - 100 Installation & Service Manual page 89

Code + Description Cause
E01 (blocking error) The temperature of the
water at the top of the
tank is > 85
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
o
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
o
(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 dummy sensor / flue gas sensor comprises dummy sensor / flue gas sensor 1 and dummy sensor / flue gas sensor 2.
Instruction manual SGS
Solution
None. This is a temporary message that may appear from time to
time, but will disappear automatically.
o
C.
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 the high-limit 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
89