Calling Up The Fault Memory; Deleting The Fault Memory; Resetting Parameters To Factory Settings; Preparing The Repair Work - Glow-worm SUSTAIN 25c -A Installation And Maintenance Instructions Manual

11.2

Calling up the fault memory

The last 10 fault codes are stored in the fault memory (to-
gether with the time at which the respective fault occurred
and, after 24 hours, with the number of days).
▶
Hold the button down for more than 7 seconds.
Overview of fault codes (→ Page 33)
▶
Press the button to exit this menu.
11.3

Deleting the fault memory

1. Delete the fault memory using diagnostics code d.94.
2. Set the diagnostics code. (→ Page 16)
Overview of diagnostics codes (→ Page 28)
11.4

Resetting parameters to factory settings

1. Reset all parameters to the factory settings using dia-
gnostics code d.96.
2. Set the diagnostics code. (→ Page 16)
Overview of diagnostics codes (→ Page 28)
11.5

Preparing the repair work

1. Switch off the product.
2. Disconnect the product from the power mains.
3. Remove the front casing.
4. Close the gas isolator cock.
5. Close the service valves in the heating flow and in the
heating return.
6. Close the service valve in the cold water pipe.
7. Drain the product if you want to replace water-bearing
components of the product.
8. Ensure that water does not drip on live components
(e.g. the electronics box).
9. Use only new seals.
11.6

Replacing defective components

11.6.1 Replacing the burner
1. Remove the gas-air mixture unit. (→ Page 22)
2. Remove the two burner seals.
3. Remove the burner.
4. Insert the new burner.
5. Insert two new burner seals in the burner cover.
6. Install the gas-air mixture unit. (→ Page 24)
11.6.2 Replacing the gas-air mixture unit
1. Remove the gas-air mixture unit. (→ Page 22)
2. Install the new gas-air mixture (→ Page 24).
11.6.3 Replacing the heat exchanger
1. Remove the side section. (→ Page 11)
2. Remove the gas-air mixture unit. (→ Page 22)
0020200954_00 SUSTAIN ..c Installation and maintenance instructions
D
2
E
C
3. Remove the gas pipe (1).
4. Remove the supply pipe (2).
5
E
B
5. Remove the return pipe (3).
6. Undo the clip underneath the condensate tray (4).
7. Undo the four screws (5).
Troubleshooting 11
B
A
C
A
D
1
3
4
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