135
ENGLISH
The same to "PP".
H2
Refrigerant liquid temp. sensor (T2) fault
Check the resistance of the sensor
The T2 sensor connector is loosen. Reconnect it
The T2 sensor connector is wet or there is water inside, make the connector dry. Add
waterproof insulation
The T2 sensor failure, change with a new sensor.
H3
Refrigerant gas temp. sensor (T2B) fault
1. Check the resistance of the sensor
2. The T2B sensor connector is loosen. Reconnect it.
3. The T2B sensor connector is wet or there is water in. remove the water, make the
connector dry. Add waterproof adhesive
H5
Room temp.sensor (Ta) fault
4. The T2B sensor failure, change a new sensor. 1.Check the resistance of the sensor.
2. The Ta sensor is in the interface.
3. The Ta sensor failure: change a new sensor or change a new interface, or reset
the Ta, connect a new Ta from the hydraulic
H9
Outlet water for zone 2 temp.sensor
(Tw2) fault
1. Check the resistance of the sensor.
2. The Tw2 sensor connector is loosen. Reconnect it.
3. The Tw2 sensor connector is wet or there is water in. Remove the water, make the
connector dry. add waterproof adhesive.
4. The Tw2 sensor failure, change a new sensor.
HA
Outlet water temp.sensor (Tw_out) fault
1. The TW_out sensor connector is loosen. Reconnect it.
2. The TW_out sensor connector is wet or there is water in. remove the water, make
the connector dry. add waterproof adhesive.
3. The TW_out sensor failure, change a new sensor
H
b
Three times “PP” protection and Tw_
out<7°C
The same to "PP".
HD
Communication fault between hydraulic
module parallel
1. The signal wires of slave units and master unit are not effectively connected. After
checking all signal wires are well connected, and making sure there is no strong
electricity or strong magnetic interference, power on again;
2. There are two or more outdoor unit connected to the wired controller. After removing
the excess wired controller and keep only the wired controller of the master unit,
power on again; 3.The power-on interval between the master unit and the slave
unit is longer than 2min. After ensuring that the interval between the power-on of
all the master units and slave units is less than 2min, power on again;
4.The addresses of master unit and slave units are repeated: by pressing the SW2
button on main board once on slave units, the address code of the slave unit will
be displayed on the digital display (normally address code, one of 1, 2, 3 ... 15 will
be shown on main board), check whether there is a duplicate address. lf there is
a duplicate address code, after powering off the system,set the S4-1 to "ON"on
master outdoor unit main board or the salve outdoor unit main board which display
"Hd" error(refer to 10.1.1 FUNCTION SEETING).Power on again,all the units last
for 5 minutes without "Hd" errar, power off again and set the S4-1 to "OFF". The
system will recover.
HE
Communication errar between main bo-
ard and thermostat transfer board
RT/Ta PCB is setto be valid on user interface but thermostat transfer board is not con-
nected or the communication between thermostat transfer board and main board is not
effectively connected. lf thermostat transfer board is not needed, set the RT/Ta PCB to
invalici. lf thermostat transfer board is needed, please connect it to main board and make
sure the communication wire is connected well and there is no strong electricity or strong
magnetic interference.
P5
Inlet water temp.sensor (Tw_in)
malfunction
1. Check that all shut off valves of the water circuii are completely open.
2. Check if the water filter needs cleaning.
3. Referto" 9.5 Filling water"
4. Make sure there is no air in the system (purge air).
5. Check the water pressure. The water pressure must be >1 bar(water is cold).
6. Check that the pump speed setting is on the highest speed.
7. Make sure that the expansion vessel is not broken.
8. Check that the resistance in the water circuii is not too high for the pump. (referto
"10.4 The circulation pump" ).
P
b
Anti-freeze mode
Unit will return to the normai operation automatically
PP
Tw_out - Tw_in unusual protection
1.Check the resistance of the two sensor.
2. Check the two sensors locations.
3. The water inlet/outlet sensor wire connector is loosen. Reconnect it.
4. The water inlet/outlet ( TW_in /TW_out) sensor is broken, Change a new sensor.
5. Four-wayvalve is blocked. Restart the unit again to let the valve change the direction.
6. Four-wayvalve is broken, change a new valve.
b
CAUTION
In winter if the unit has E0 and Hb failure and the unit is not repaired in time, the water pump and pipeline sysyem may be
damaged by freezing, so E0 and Hb failures mut be repaired in itme
Summary of Contents for 20191845
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