Backup Heater Thermal Protector; Checking Procedures; Repair Procedures - Daikin Altherma EBLQ011CAV3 Service Manual

2 Components
1 Disconnect the wiring from the backup heater contactor
terminals.
2 Remove the screws and remove the backup heater contactors
from the switch box.
3 To install the backup
procedures" on page 42.
To install the backup heater contactors
1 Install the backup heater contactors in the switch box and fix
them using the screws.
2 Connect the wiring to the correct backup heater contactor
terminals.
Is the problem solved?
Yes
No
2.5

Backup heater thermal protector

2.5.1

Checking procedures

INFORMATION
It is recommended to perform the checks in the listed
order.
To perform a mechanical check of the backup
heater thermal protector
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 77.
1 Turn ON the power of the unit.
2 If the backup heater thermal protector has tripped, reset the
backup heater thermal protector by pushing the red button.
3 Remove the backup heater thermal protector sensor from the
backup heater.
4 Submerge the backup heater thermal protector sensor in water
and heat the water.
5 Measure the temperature of the water. The backup heater
thermal protector MUST trip at a temperature of approximately
92°C.
Does the backup heater
thermal protector trip at
approximately 92°C?
Yes
No
To perform an electrical check of the backup
heater thermal protector
Prerequisite: First perform a mechanical check of the backup
heater thermal protector, see
page 48.
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Service manual
48
heater contactors, see "Repair
Action
No further actions required.
Return to "Checking
procedures" on page 45 of the
backup heater and continue with
the next procedure.
"2.19 Plate
Action
Perform an electrical check of the
backup heater thermal protector,
see "2.5.1 Checking
procedures" on page 48
Replace the backup heater
thermal protector, see
"2.5.2 Repair procedures" on
page 48.
"2.5.1 Checking procedures" on
1 Relocate the switch box if required.
2 Remove the 2 screws from the backup heater thermal protector
bracket.
3 Remove the 2 screws and remove the backup heater thermal
protector from the bracket.
4 Disconnect the wires from the backup heater thermal protector.
5 Measure the circuit breakers between the backup heater
thermal protector terminals 11‑12, 21‑22, and 31‑32. All circuit
breakers MUST be closed.
All measured circuit breakers
are closed?
Yes
No
2.5.2

Repair procedures

To remove the backup heater thermal protector
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 77.
1 Remove the backup heater thermal protector sensor from the
backup heater.
a Backup heater thermal protector sensor
b Backup heater
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Action
Backup heater thermal protector
is OK. Return to the
troubleshooting of the specific
error and continue with the next
procedure.
Replace the backup heater
thermal protector, see
"2.5.2 Repair procedures" on
page 48.
"2.19 Plate
a b
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02