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178
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Service
'10 • HM-T-149
Function check, components
Indoor unit Relay test - forced control
Control conditions
Forced control of the relays can be carried out in Menu 9.3.7.0.
Menu 9.3.7.1 must be selected to “On” in order for the function
to be activated. Respective relay controlled by selecting 0, 1 or
dash (-) for each relay in Menu 9.3.7.2 to 9.3.7.15.
0
is not powered -inactive,
1
is voltage out -active, and (-)
means “Auto”, i.e. the control system selects whether the
output is active or inactive.
Forced control must only be used by users familiar with
the system. When forced control is activated, the alarm
functions are disabled.
WARNING!
Testing shunts
Relay 2 and 3 are connected in series and used to control
Three-way valve Cooling/heating.
Relays K4 and K5 are used to open and close mixing valve
QN11. Therefore, relays K4 and K5 must not be set to mode 1
at the same time.
To open the mixing valve, select relay K4 to position 1 and
relay K5 to position 0.
To close the mixing valve, select relay K5 to position 1 and
relay K4 to position 0.
The mixing valve is locked when K4 and K5 are in position 0.
Relays K13 and K14 are used to open and close mixing valve
2. Therefore, relays K13 and K14 must not be set to mode 1 at
the same time.
To open the mixing valve, select relay K13 to position 1 and
relay K14 to position 0.
To close the mixing valve, select relay K14 to position 1 and
relay K13 to position 0.
The mixing valve is locked when K13 and K14 are in position
0.
Function check, components
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