Booster Heater; Checking Procedures - Daikin altherma 3 M Service Manual

3.5 Booster heater

3.5.1 Checking procedures

To perform a resistance check of the booster heater
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
INFORMATION
It is recommended to perform the checks in the listed order.
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
1 Remove the required plate work, see
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
INFORMATION
Make sure that the wiring between the booster heater contactor and the booster
heater is properly connected and NOT damaged (check continuity), see
4
diagram" [ 314].
Is the measured booster heater
resistance correct?
Yes
No
"3.6 Booster heater thermal
"3.17 Plate
diagram" [ 4 314] for more detailed information.
Action
Return to
procedures" [
heater and continue with the next
procedure.
Replace the booster heater, see
"3.5.2 Repair
3 Components
|
4
protector" [ 133].
4
work" [ 230].
"6.2 Wiring
"3.5.1 Checking
4
129] of the booster
4
procedures" [ 132].
Service manual
129