Bosch C1210ES Specifications download pdf (Page 53)

6 720 644 887

Error codes

Ionization failure during operation. 1. Check gas type,

Fig. 2

page 6

2. Check three wire connections to ignition group on the lower

front of the heat exchanger are secure.

3. Verify that venting specifications are met. Improper venting may

cause premature failure of the flame sensor rod. See

chapter 3.3

page 10

4. Check gas pressure. See

chapter 3.14, page 35.

5. Check and adjust CO

readings. See

chapter 6.5, page 42.

6. Check that the minimum power fan speed has been adjusted to

the proper value. See

page 21

Internal hardware/software failure. 1. Disconnect power supply cord and check the two wire and

ground connections on control board as well as ground connection

on heater chassis.

2. Pressing the wrong combination of buttons on the control unit

can create confusion among the microprocessors inside. In this

case, the error code should not happen more than once or twice.

Turn off the water heater. Turn water heater back on and try

resetting error code. Use the reset button ( ) to reset any error

codes.

3. Possible defective control unit call Bosch Water Heating for

further instructions.

Ionization error at standby. 1. Loose connection to the flame ionization rod. Verify that the

thinner wire leading from the control unit is securely connected to

the set of electrodes located on the lower front of the heat

exchanger.

2. Flame ionization rod or control unit may be damaged. Contact

Bosch Water Heating for further instruction.

Gas leakage error, gas valve circuit

not closing properly.

1. Disconnect power supply cord and check wire connections on

gas valve and the two connectors on the control board.

2. Loose connection to the flame ionization rod. Verify that the

thinner wire leading from the control unit is securely connected to

the set of electrodes located on the lower front of the heat

exchanger.

3. Gas valve may be defective, contact Bosch Water Heating for

further instrucation.

Display Cause Solution

Table 29

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 71 72

Comments to this Manuals

No comments

Bosch C1210ES Specifications Page 53

Comments to this Manuals

Related products and manuals for Water heaters & boilers Bosch C1210ES