Daikin Altherma 3 M - Booster Heater; Checking Procedures

3 | Components
Service manual
129
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
3.5 Booster heater
3.5.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a resistance check of the booster heater
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Check that the booster heater thermal protector functions correctly.
Reset if it has tripped. See "3.6Booster heater thermal protector"[4133].
1 Remove the required plate work, see "3.17Plate work"[4230].
a
a Booster heater contactor K3M
2 Measure the booster heater resistance between K3M/1 and K3M/3.
Result: The measured resistance MUST be approximately 18Ω.
INFORMATION
See the "6.2Wiring diagram"[4314] for more detailed information.
INFORMATION
Make sure that the wiring between the booster heater contactor and the booster
heater is properly connected and NOT damaged (check continuity), see "6.2Wiring
diagram"[4314].
Is the measured booster heater
resistance correct?
Action
Yes Return to "3.5.1Checking
procedures"[4129] of the booster
heater and continue with the next
procedure.
No Replace the booster heater, see
"3.5.2Repair procedures"[4132].