37
SETUP OF THE SYSTEM
To set the OTHER HEATING SOURCE, go to MENU> FOR SERVICEMAN> OTHER
HEATING SOURCE, Press OK. The following page will appear:
Backup heater (electrical booster)
NOTE: It is also necessary to set up the DIP SWITCH of the electronic board
of the indoor unit. For details, see paragraph "Electronic board's DIP switch
settings of the of the indoor unit".
If backup heater is available, please select YES at BACKUP HEATER. Press OK and the
following page is displayed:
When the cursor is on HEAT MODE or DHW MODE, Use ◄ ► to select YES or NON. If YES is selected, the backup heater will
be available in the corresponding mode, otherwise it will be unavailable.
dT1_IBH_ON is the temperature difference between T1S and
T1 for starting the backup heater. Only when at the T1<T1S-
dT1_IBH_ON can the backup heater turn on. When a se-
cond backup heater is installed, if the temperature difference
between T1S and T1 is larger than dT1_IBH_ON+2, the se-
cond backup heater will turn on. The relationship between
operation of the backup heater and the temperature differen-
ce is shown in the diagram below.
t_IBH_DELAY is the time that the compressor has run before
the fi rst backup heater turns on (if T1<T1S).
t_IBH12_DELAY is the time that the fi rst backup heater has
run before the second backup heater turns on.
Other heating source
The OTHER HEATING SOURCE is used to set whether the backup heater, and additional heating sources like a boiler or solar
energy kit is available.
7 OTHER HEATING SOURCE
7.1.BACKUP HEATER
7.2.AHS
7.3.SOLAR ENERGY
SCROLL
YES
YES
NON
NON
YES NON
7.1 BACKUP HEATER
HEAT MODE
DHW MODE
T4_IBH_ON
dT1_IBH_ON
t_IBH_DELAY
t_IBH12_DELAY
-5
°C
5
°C
30MIN
5MIN
SCROLL
YES
YES
NON
NON
OFF
T4
T4HMIN
T4HMAX
Heat mode
by heat pump
T4_IBH_ON
Heat mode
by IBH only
Heat mode by heat
pump and IBH
Heat mode
by heat pump and IBH
Heat mode
by IBH only
Heat mode
by heat pump
T1S-dT1_IBH_ON
IBH1 OFF
IBH1_ON
T1
T1S-dT1_IBH_ON-2
IBH2 OFF
IBH2_ON
T1
T1s-T1
T4＜T4_IBH_ON
OFF
OFF
OFF
ON
OFF
OFF
ON
ON ON
ON
t_IBH_delay t_IBH12_delay t_IBH_delay t_IBH12_delay
dT1_IBH_ON+2
dT1_IBH_ON-2
dT1_IBH_ON
IBH 2
IBH 1
Compressor
When the cursor is on T4_IBH_ON, dT1_IBH_ON, t_IBH_
DELAY, or t_IBH12_DELAY, Use ◄ ► and ▼ ▲ to scroll and
adjust the parameter.
T4_IBH_ON is the outdoor air temperature for starting the
backup heater. If the outdoor air temperature rises above
T4_IBH_ON, the backup heater will be unavailable. The re-
lationship between operation of the backup heater and the
outdoor air is shown in the picture below.
"SOLAR ENERGY" must not be used: set to NON.
NOTE
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