Daikin Altherma EBLQ011CA3V3 - Page 46

2 Components
Service manual
46
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
3 Set the Megger voltage to 500VAC.
4 Connect the Megger ground test lead directly to the backup
heater ground wire.
CAUTION
Do NOT connect the Megger ground test lead to any other
ground wire.
5 Measure the insulation resistance between the following
terminals. The measured insulation resistance MUST be
>3MΩ.
Net Terminals
Single phase K1M1‑ground.
Three phase K1M1‑ground, K1M3‑ground,
K1M5‑ground, K2M1‑ground,
K2M3‑ground, K2M5‑ground.
X6M 1 2 3 5 6 7 84 X7M
BLK GRY RED BRN
L N
3
4
1
2
K1M
F1T
3
4
5
6
1
2
K1M
3
4
5
6
1
2
K2M
3
4
5
6
1
2
K5M
13
14
F1T
F1T
F1T F1T
F1T
F1T
Q1DI
E1H E1H E1H E2H E2H E2H
E3H
1
2
3
4
F2B
I I
12
11
Q1L
22
21
a
a
a Backup heater ground
NOTICE
The info above is an example of how to operate. Check the
wiring diagram for correct backup heater terminals, see
"5.2Wiring diagram"on page101.
Is the measured backup heater
insulation resistance correct?
Action
Yes Return to "Checking
procedures"on page45 of the
backup heater and continue with
the next procedure.
No Replace the backup heater, see
"Repair procedures"on
page46.
Problem solved?
After all checking procedures listed above have been performed:
Is the problem solved? Action
Yes No further actions required.
No Return to the troubleshooting of
the specific error and continue
with the next procedure.
Repair procedures
To remove the backup heater
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work.
1 Drain water from the water circuit, see "3.3.2 Repair
procedures"on page96.
2 Cut the insulation that covers the upper backup heater coupling.
3 Open the insulation and remove the screw from the pipe clamp.
a e
d
c
b
a Screw
b Pipe clamp
c Clip
d Upper backup heater coupling
e Backup heater
4 Remove the clip from the upper backup heater coupling.
5 Remove the pipe from the pipe clamp to improve
manoeuvrability of the backup heater.
6 Separate the upper backup heater coupling.
INFORMATION
Make sure that the O-ring stays in place.
7 Remove the backup heater thermal protector sensor from the
backup heater.
8 Remove the clip from the lower backup heater coupling.
c
a
b
a Clip
b Lower backup heater coupling
c Backup heater
9 Separate the lower backup heater coupling.