Water Heater/Boiler does not operate

TASK 25-35-00-810-812-A
Water Heater/Boiler does not operate

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 24-56-00-810-801-A	Galley Supply Fault
ASM 253101
ASM 253201
ASM 253301
AMM 25-35-00-710-023	Operational Test of the Water Heater/Boiler
AMM 25-35-27-000-001	Removal of the Water Boiler/Heater
AMM 25-35-27-400-001	Installation of the Water Boiler/Heater

3. Fault Confirmation
Subtask 25-35-00-710-072-A ** ON A/C NOT FOR ALL

A. Do the Operational Test of the water heater AMM 25-35-00-710-023.

4. Fault Isolation
Subtask 25-35-00-810-061-A ** ON A/C NOT FOR ALL

A. If the water heater does not operate during the test:

(1) If the fault continues:

Do a check and, if necessary, repair the wiring between the related galley control panel and the electrical connector of the water heater .
Do a check and, if necessary, repair the related circuit breaker(s) at the galley control panel and, if installed, the related relays or switches ASM 253101, ASM 253201 and ASM 253301.

(2) If the fault continues:

Do a check and, if necessary, repair the wiring of the galley (Ref. TSM TASK 24-56-00-810-801).

Subtask 25-35-00-710-073-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A

[Rev.8 from Aug 2018] 2026.04.04 04:27:02 UTC