150
Removing the circulation pump head
Fig. 101
Torque settings
■
Torque settings for the circuit pump union nuts:
70 ±2 Nm
■
Torque for the screws on the pump head:
5 ±1 Nm
Status display, internal circulation pumps
Fig. 102
LED Meaning
B
flashes
green.
Normal operation, circulation pump
runs on demand.
B
lights up
green.
■
Circulation pump runs continuously
with maximum output, e.g. when
the PWM signal is interrupted.
■
No fault message
A
lights up
red.
■
Fault with fault message
■
When isolating the indoor unit from
the power supply, the LED illumi-
nates for the duration of the run-on
time of approx. 30 to 60 s. When
carrying out repair work, wait until
the run-on time has elapsed.
Indoor unit maintenance
Removing hydraulic components and EPP… (cont.)
6222080
Maintenance
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