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Symptom 8: DHW mode can't change to Heat mode immediately
POSSIBLE CAUSES
Heat exchanger for space
heating not big enough
Space heating load is small
Disinfect function is
enabled but without TBH
Manual turn on the FAST WATER
function, after the hot water meets
the requirements, the heat pump
fails to switch to the air-conditioning
mode in time when the air
conditioner is in demand
When the ambient temperature is
low, the hot water is not enough
and the AHS is not operated or
operated late
DHW mode priority
Symptom 9: DHW mode heat pump stop work but setpoint not reached, space heating require heat but unit stay in DHW mode
POSSIBLE CAUSES
Surface of coil in the tank
not large enough
TBH or AHS not available
13.3 Operation parameter
This menu is for installer or service engineer reviewing the operation parameters.
At home page, go to ''
''>''OPERATION PARAMETER''.
Press ''
''. There are nine pages for the operating parameter as following. Press ''▼ ''
ress ► and
to check slave units' operation parameter in cascade s stem. The address code in the upper right corner
00
will change from "#00" to "#01" "#02" etc. accordingly
OPERATION PARAMETER
ONLINE UNITS NUMBER
OPERATE MODE
COOL
SV1 STATE
SV2 STATE
SV3 STATE
PUMP_I
ADDRESS
OPERATION PARAMETER
T5 WATER TANK TEMP.
Tw2 CIRCUIT2 WATER TEMP.
TIS' C1 CLI. CURVE TEMP.
TIS2' C2 CLI. CURVE TEMP.
TW_O PLATE W-OUTLET TEMP. 35°C
TW_I PLATE W-OUTLET TEMP.
ADDRESS
Set t DHWH
60min.
f circulating pump out of unit is not controlled b unit, tr to
connect it to the unit.
Add 3-wa valve at the inlet of fan coil to ensure enough water
flow.
Normal , no need for heating
Disable disinfect function
add TBH or AHS for DHW mode
Manual turn off the FAST WATER function
Set T4DHWM N , the suggested value is
Set T4 TBH ON , the suggested value is
If there is AHS or IBH connect to the unit, when the outdoor unit failed, the
hydraulic module board must run DHW mode till the water temperature
reach the setting temperature before change to heating mode.
The same solution for Symptom 7
Heat pump will stay in DHW mode untill "t_DHWHP_MAX" reached or
setpoint is reached. Add TBH or AHS for DHW mode,TBH and AHS should
be controlled by the unit.
OPERATION PARAMETER
1
PUMP-O
PUMP-C
ON
PUMP-S
OFF
PUMP-D
OFF
PIPE BACKUP HEATER
ON
TANK BACKUP HEATER
ADDRESS
1/9
OPERATION PARAMETER
53°C
Tbt1 BUFFERTANK_UP TEMP.
35°C
Tbt2 BUFFERTANK_LOW TEMP. 35°C
35°C
Tsolar
35°C
IDU SOFTWARE
30°C
ADDRESS
4/9
66
CORRECTIVE ACTION
MAX to minimum value, the suggested value is
-5
5
CORRECTIVE ACTION
''▲'' to scroll.
OPERATION PARAMETER
GAS BOILER
OFF
T1 LEAVING WATER TEMP.
OFF
WATER FLOW
OFF
HEAT PUMP CAPACTIY
OFF
POWER CONSUM.
OFF
Ta ROOM TEMP
ON
ADDRESS
2/9
OPERATION PARAMETER
35°C
ODU MODEL
COMP.CURRENT
25°C
COMP.FREQENCY
01-09-2019V01
COMP.RUN TIME
COMP.TOTAL RUN TIME
EXPANSION VALVE
ADDRESS
5/9
OFF
35°C
1.72m
/h
3
11.52kW
1000kWh
25°C
3/9
6kW
12A
24Hz
54 MIN
1000Hrs
200P
6/9
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