Gree Versati II Series User manual

Change for life
GREE ELECTRIC APPLIANCES, INC.OF ZHUHAI
Air-to-water Heat Pump Monobloc Versati
Test Operation & Troubleshooting & Maintenance

CONTENTS
1 Trial Run �������������������������������������������������������������������������������������������������� 1
1.1 Check for Wiring......................................................................................................... 1
1.2 Check for the Water System ...................................................................................... 1
1.3 Check for the Communication System....................................................................... 1
1.4 Trial Run..................................................................................................................... 1
2 Error Code List���������������������������������������������������������������������������������������� 1
3 Flow Chart Of Troubleshooting ������������������������������������������������������������� 3
3.1 Comp High-pressure Protection E1 .......................................................................... 3
3.2 Comp Low- pressure Protection E3 .......................................................................... 4
3.3 Comp Discharge Temp Protection E4 ....................................................................... 4
3.4 Overload Protection of Compressor or Driver Error .................................................. 5
3.5 DC Fan Error EF ....................................................................................................... 5
3.6 Temperature Sensor Error......................................................................................... 6
3.7 Communication Malfunction E6 ................................................................................ 6
3.8 Capacity Switch Error (Code:"C5")............................................................................. 7
4 Diagnosis of Driving������������������������������������������������������������������������������� 7
4.1 Diagnosis Flowchart of Driving of Single-phase Unit and Three-phase Unit.............. 7
5 Daily Maintenance and Repair��������������������������������������������������������������11
5.1 Daily Maintenance.................................................................................................... 11
5.2 Troubleshooting........................................................................................................ 12
5.3 Repair....................................................................................................................... 12

1
Test Operation & Troubleshooting & Maintenance
1 Trial Run
1�1 Check for Wiring
WARNING!
Do not check for the power supply unless proper checkout equipment has prepared and preventive
measures have been taken, otherwise it would lead to severe injury.
◆Are sizes of connection lines and the air switch proper?
◆Does wiring comply with relative standards and electric codes?
◆Is there any incorrect wiring?
◆Does each contact work properly?
◆Is the power supply and insulation proper?
◆Are initial set points of control and protective elements satised?
1�2 Check for the Water System
◆Are water inlet and outlet directions correct?
◆Is the water piping cleaned? Are there foreign matters at the pipe joints? Is the water quality satised?
◆Is insulation of water pipes in good condition?
◆Does exhaust valve of the water system work properly?
1�3 Check for the Communication System
When the unit is powered on, check for the communication system, including: communication between AP1
and AP2, between the wired controller and the main board. When there is unusual communication, this error will
be displayed at the wired controller. Then, check out the cause according to the displayed error. See the gure
below for wiring of the communication system.
CN8CN7
CN6CN5
AP1
AP2
Wired controller
CN5(Red)
Long-distance
Minitor PC(BMS)
CN4(White)
1�4 Trial Run
Start the unit when there is no any problem for wiring and piping. After startup, check for the electrostatic
expansion valve, water pump, fan, and compressor to see if they work normally. When there is any error, solve
it according to the troubleshooting owchart covered in this manual. However, if the troubleshooting owchart is
still unhelpful, please contact GREE sales agent.
2 Error Code List
No� Full Name Displayed Name Error Code
1 Ambient temperature sensor error Ambient sensor F4
2 Defrost temperature sensor error Defro. sensor d6
3 Discharge temperature sensor error Disch. sensor F7
4 Suction temperature sensor error Suction sensor F5
5 Outdoor fan error Outdoor fan EF
6 Compressor internal overload protection Comp. overload H3

2
Test Operation & Troubleshooting & Maintenance
7 High pressure protection High pressure E1
8 Low pressure protection Low pressure E3
9 High discharge protection Hi-discharge E4
10 Refrigerant loss protection Refri-loss P2
11 Heat pump-water pump protection HP-pump E0
12 Solar kit-water pump protection SL-pump EL
13 Swimming pool-water pump protection Swimming-pump
14 Incorrect capacity DIP switch setting Capacity DIP c5
15 Communication error between indoor and outdoor unit ODU-IDU Com. E6
16 Drive communication error Drive com.
17 High pressure sensor error HI-pre. sens. Fc
18 Enthalpy-enhancing sensor error En. senser F8
19 Low pressure sensor error LOW-pre. Sens. dL
20 Heat exchanger-leaving water temperature sensor error Temp-HELW F9
21 Auxiliary heater-leaving water temperature sensor error Temp-AHLW dH
22 Heat exchanger-entering water temperature sensor error Temp-HEEW
23 Water tank water temperature sensor 1 error Tank sens. 1 FE
24 Water tank water temperature sensor 2 error Tank sens. 2
25 Solar kit-entering water temp sensor T-SL water out
26 Solar kit-leaving water temp sensor T-SL water in FH
27 Solar kit- temp sensor T-Solar pannel FF
28 Swimming pool-entering water temp sensor T-Swimming in
29 Swimming pool-leaving water temp sensor T-Swimming out
30 Swimming pool-water temp sensor T-Swimming
31 Remote room sensor 1 T-Remote Air1 F3
32 Remote room sensor 2 T-Remote Air2
33 Heat pump-water ow switch HP-Water SW Ec
34 Solar kit-water ow switch SL-Water SW F2
35 Swimming pool-water ow switch SW-Water SW F1
36 Welding protection of the auxiliary heater 1 Auxi. heater 1 EH
37 Welding protection of the auxiliary heater 2 Auxi. heater 2 EH
38 Welding protection of the water tank heater Auxi. -WTH EH
39 Under-voltage DC bus or voltage drop error DC under-vol. PL
40 Over-voltage DC bus DC over-vol. PH
41 AC current protection (input side) AC curr. pro. PA
42 IPM defective IPM defective H5
43 PFC defective FPC defective Hc
44 Start failure Start failure Lc
45 Phase loss Phase loss LD
46 Drive module resetting Driver reset P6
47 Compressor over-current Com. over-cur. P0
48 Overspeed Overspeed P5
49 Sensing circuit error or current sensor error Current sen. LF

3
Test Operation & Troubleshooting & Maintenance
50 Desynchronizing Desynchronize Pc
51 Compressor stalling Comp. stalling H7
52 Communication error drive-main com. LE
53 Radiator or IPM or PFC module overtemperature Overtemp.-mod. P8
54 Radiator or IPM or PFC module temperature sensor error T-mod. sensor P7
55 Charging circuit error Charge circuit Pu
56 Incorrect AC voltage input AC voltage PP
57 Drive board temperature sensor error Temp-driver PF
58 AC contactor protection or input zero crossing error AC contactor P9
59 Temperature drift protection Temp. drift PE
60 Current sensor connection protection (current sensor not connected to
phase U/V) Sensor con. PD
61 Communication error to the outdoor unit ODU Com. E6
62 Communication error to the indoor unit IDU Com. E6
63 Communication error to the drive Driver Com. E6
64 Solar kit-superheating Solarsuperheat F6
3 Flow Chart Of Troubleshooting
3�1 Comp High-pressure Protection E1
Comp High-pressure protection E1
Check if the High-pressure switch
is broken
Replace the High-pressure
switch
Check if the High-pressure switch
wiring is loose.
Replace the wiring
Check if the water in
the tank is enough
Check if the installation of
tank temp sensor is correct
Check if the gas valve and
liquid valve are fully open
Check if the electric expansion
valve can work normally
Fill the tank with the water
Install rightly the
tank temp sensor
Fully open the valve
Replace the electronic
expansion valve
yes
no
yes
no
no
no
yes
yes
yes
yes
no

4
Test Operation & Troubleshooting & Maintenance
3�2 Comp Low- pressure Protection E3
Comp Low-pressure Protection E3
Check if comp low-pressure switch
is broken or the wiring is loose.
Replace comp
low- pressure or rewire
Check if the fans stop running or reverse Check the fans
Check if the system has leaked
Repair the leakage of system
pipe and add refrigerant
according to the required volume
yes
no
yes
no
no
3�3 Comp Discharge Temp Protection E4
Comp Discharge Temp Protection E4
Measure if the exhaust
temperature of compressor
reaches120℃
Replace the corresponding
exhaust temperature
sensor
Check if the the electronic
expansion valve is blocked
Check if the system has leaked
The refrigerant of the system is
not enough and add refrigerant
according to the required volume
Repair the leakage of system
pipe and add refrigerant
according to the required volume
yes
yes
no
yes
Measure if the
resistance of temperature
sensor is correct
Replace the mainboard
of AP2
no no
yes
Replace the electronic
expansion valve

5
Test Operation & Troubleshooting & Maintenance
3�4 Overload Protection of Compressor or Driver Error
Comp Overload Protection
Check if the AC
contactor is damaged
Replace the AC contactor
Check if the compressor
wiring is correct
Adjust the
compressor wiring
Check if the voltage is normal
Check if the refrigerant of
the system is excessive
Contact the power
supply company
Recharge suitable
amount of the refrigerant
yes
no
no
yes
no
yes
yes
3�5 DC Fan Error EF
EF is displayed on
the wired controller
Is the motor wire
phase sequence right? Adjust the motor wire
Is the Fan wire
terminal loose?
Replace the mainboard AP2.
Does it work normally?
Work Normally
yes
no
yes
no
no
Tighten the fan
wiring terminal
Replace the outdoor fan
yes

6
Test Operation & Troubleshooting & Maintenance
3�6 Temperature Sensor Error
Temperature Sensor Error
Check if the plug
on temperature sensor is correctly
connected to the socket.
Check the orientation
of plug and socket
Check if the resistance of
temperature sensor is correct.
yes
yes
no
Replace the
temperature sensor
no
Replace the mainboard of the AP1 or AP2
3�7 Communication Malfunction E6
Communication Malfunction E6
Check if the communication
line of the unit is connected
Check the orientation
of plug and socket
Measure if the Communication
line is through
yes
no
Replace the communication line
no
Check if the communication line
of the unit is connected correctly
yes
Check the orientation
of plug and socket
no
Check if the monobloc unit
is electrically powered
yes
Please supply power
to the monobloc unit
no

7
Test Operation & Troubleshooting & Maintenance
3�8 Capacity Switch Error (Code:"C5")
Communication Malfunction E6
Check if the communication
line of the unit is connected
Measure if the Communication
line is through
yes
no
no
Check if the communication line
of the unit is connected correctly
yes
yes
no
Communication
Malfunction E6
Communication
Malfunction E6
Communication
Malfunction E6
Communication
Malfunction E6
Communication
Malfunction E6
4 Diagnosis of Driving
4�1 Diagnosis Flowchart of Driving of Single-phase Unit and Three-phase Unit
4�1�1 Drive Module Reset(Code:"P0") ; IPM or PFC Temperature Sensor Error(Code:"P7") ; AC Current
Protection (Input Side)(Code:"PA"); Current Sense Circuit Error(code:"PC"); PFC Protection(Code:"HC")

8
Test Operation & Troubleshooting & Maintenance
“Driver reset”,“T-mod. sensor”,
“AC curr. pro.”,“FPC defective”
or “Current sen.” is displayed
on the wired controller
P0, P7, PA, HC
or PC is displayed
in the mainboard
88 indicating lamp
Replace
the driver board AP4
Work Normally
4�1�2 IPM or PFC Over-temperature Protection(Code:"P8")
Is the IPM or
PFC module of
the driver board AP4 tightened ?
Replace the
driver board AP4
“Overtemp.-mod.” is
displayed on the wired
controller
P8 is displayed in the
mainboard 88
Indicating Lamp
Work Normally
Tighten the IPM or
PFC module

9
Test Operation & Troubleshooting & Maintenance
4�1�3 DC Busbar Over-voltage Protection(Code:"PH") ; DC Busbar Under-voltage Protection(Code:"PL")
Is input voltage ranged
from 185VAC to 264VAC?
Replace the mainboard
“DC over-vol.” or “DC
under-vol.” is displayed
on the wired controller
PH or PL is displayed
in the mainboard 88
Indicating Lamp
Work Normally
Please cut off
the power and notify
the power company.
Replace the mainboard.
Does it work normally?
Note: three-phase input voltage is in the range from 320VAC to 475VAC.
4�1�4 Drive-to-main-control Communication Error(Code:"P6")
“Drive-main com.” is
Displayed on the wired
controller
P6 is displayed in the
mainboard 88
Indicating Lamp
Is the CPU tightened?
Is the CPU tightened? Is the CPU tightened?
Work Normally

10
Test Operation & Troubleshooting & Maintenance
4�1�5 Compressor Startup Failure(code:"LC")
"Start failure" is
displayed on the
wired controller
LC is displayed in
the mainboard 88
indicating lamp
Replace
the
driver board AP4.
Does it work Normally?
Replace
the compressor
Work Normally
yes
no
4�1�6 Compressor Current Protection (Code:"P5"); Compressor Motor Desynchronizing (Code:"H7");
IPM Protection (Code:"H5"); Phase Loss (Code:"LD")
"Start failure" is
displayed on the
wired controller
LC is displayed in
the mainboard 88
indicating lamp
Replace the mainboard.
Does it work Normally?
Replace the mainboard.
Does it work Normally?
Replace the mainboard.
Does it work Normally?
Replace the mainboard.
Does it work Normally?
LC is displayed in
the mainboard 88
indicating lamp
LC is displayed in
the mainboard 88
indicating lamp
LC is displayed in
the mainboard 88
indicating lamp
yes
no
yes
no
no yes

11
Test Operation & Troubleshooting & Maintenance
4�1�7 Charging Circuit Error(Code:"PU")
“Charge circuit” is
displayed on the
wired controller
PU is displayed in
the mainboard 88
indicating lamp
Is the PFC wire
tightened or is the
sequence right?
Replace
the mainboard
Tighten the PFC wire
or adjust the sequence
Work Normally
5 Daily Maintenance and Repair
5�1 Daily Maintenance
In order to avoid damage of unit, all protecting devices in the unit had been set before outgoing, so the user
can never adjust or remove them.
For the rst startup of the unit or next startup of unit after long-period stop (above 1 day)by cutting off the
power, please electrify the unit in advance to preheat the unit for more than 8hr
Never put sundries on the unit and accessories. Keep dry, clean and ventilated around the unit.
Remove the dust accumulated on the condenser n timely to ensure performance of unit and to avoid stop
of unit for protection.
In order to avoid protection or damage of unit caused by blockage of water system, clean the lter in water
system periodically and frequently check water replenishing device.
In order to ensure anti-freezing protection, never cut off the power if ambient temp. is below zero in winter.
In order to avoid frost crack of the unit, water in the unit and pipeline system not used for a long period
should be drained. In addition, open the end cap of water tank for drainage.
Never frequently make the unit on/off and close manual valve of water system during operation of unit by
users.
Ensure frequently check the working condition of each part to see if there is oil stain at pipeline joint and
charge valve to avoid leakage of refrigerant.
If malfunction of the unit is out of control of users, please timely contact with authorized service center of
company.
Note: the water pressure gage is installed in returning water line in the indoor unit, Please adjust the hydraulics
system pressure according to next item:
①If the pressure is less than 0.5 bar, please recharge the water immediately;
②When recharging, the hydraulics system pressure should be not more than 2.5 Bar.

12
Test Operation & Troubleshooting & Maintenance
5�2 Troubleshooting
Malfunctions Reasons Troubleshooting
Compressor does
not start up
① Power supply has problem.
② Connection wire is loose.
③ Malfunction of mainboard.
④ Malfunction of compressor.
① Phase sequence is reverse.
② Check out and re-x.
③ Find out the reasons and repair.
④ Replace compressor.
Heavy noise of fan
① Fixing bolt of fan is loose.
② Fan blade touches shell or grill.
③ Operation of fan is unreliable.
① Re-x xing bolt of fan.
② Find out the reasons and adjust.
③ Replace fan.
Heavy noise of
compressor
① Liquid slugging happens when liquid
refrigerant enters into compressor.
② Internal parts in compressor are broken.
① Check if expansion valve is failure and
temp. sensor is loose .If that, repair it.
② Replace compressor.
Water pump does
not run or runs
abnormally
① Malfunction of power supply or terminal.
② Malfunction of relay.
③ There is air in water pipe.
① Find out the reasons and repair.
② Replace relay.
③ Evacuate.
Compressor starts or
stops frequently
① Poor or excess refrigerant.
② Poor circulation of water system.
③ Low load.
① Discharge or add part of refrigerant.
② Water system is blocked or there is air in
it.Check water pump, valve and pipeline.
Clean water lter or evacuate.
③ Adjust the load or add accumulating
devices.
The unit does not
heat although
compressor is
running
① Leakage of refrigerant.
② Malfunction of compressor.
① Repair by leakage detection and add
refrigerant.
② Replace compressor.
Poor efciency of hot
water heating
① Poor heat insulation of water system.
② Poor heat exchange of evaporator.
③ Poor refrigerant of unit.
④ Blockage of heat exchanger at water side.
① Enhance heat insulation efficiency of the
system.
② Check if air in or out of unit is normal and
clean evaporator of the unit.
③ Check if refrigerant of unit leaks.
④ Clean or replace heat exchanger.
5�3 Repair
5�3�1 Key Components
Picture Name Function
Compressor
It is the heart of the cooling system, mainly used to
turn the low-temperature, low-pressure refrigerant
vapor to high-temperature high-pressure vapor and
then discharge it to the evaporator. The two-stage
enthalpy-adding compressor is adopted herein, which
can improve the heating performance of the unit
largely.
Electrostatic
Expansion Valve
It is one of four main components and used to turn
the hi-pressure liquid refrigerant to low-temperature,
low-pressure vapor-liquid mixture and adjust the
refrigerant ow rate entering the evaporator.

13
Test Operation & Troubleshooting & Maintenance
Vapor Liquid
Separator
It is installed at the side of the suction line, and used
to prevent liquid refrigerant entering the compressor,
which if not avoided will lead to wet compression or
even liquid slugging.
4-way Valve
It is used the switch ow direction of refrigerant
and then realize switchover between cooling and
heating. It also can be used for defrosting through the
counterow.
Plate Heat
Exchanger
It is the water-refrigerant plate type heat exchanger,
used to liquefy the high-temperature high-pressure
vapor refrigerant or evaporate the low-temperature
low pressure liquid refrigerant. Heat of condensation
is taken away by circulation water and heat for
evaporation is supplied also by circulation water.
Water Pump It is the power equipment for water circulation.
Expansion Tank
It is used to keep stable pressure of the water system.
The tank is charged with a certain volume of nitrogen
which is separated from the water side with a gasbag.
When pressure of the water side exceeds the nitrogen
pressure, the gasbag will expand and water enters
into the tank so as to lower the pressure of the water
system. In contract, when pressure of the water
system goes down, nitrogen in the tank will expel
water out to the water system.

14
Test Operation & Troubleshooting & Maintenance
Flow Switch
It is used to prevent the heat exchanger from being
frozen owing to reduced water ow rate. When the
ow rate goes down to the point at which the ow
switch will act, the switch will trip off and the unit will
raise an alarm and shut down.
Three-pipe Liquid
Receiver
Three pipes are connected to two electrostatic
expansion valves and the enthalpy-adding port of the
compressor respectively. It is mainly used to further
reduce pressure of the refrigerant which has gone
through the rst-stage throttling and then vaporize
some refrigerant. The vaporized refrigerant will be
sucked in the compressor again so as to enhance the
heating performance of the system.
Safety Valve
It is used to prevent the pressure of circulation water
from increasing unusually. When the pressure is larger
than the set point (0.6MPa), this valve will open to
relieve water pressure.
Exhaust Valve
It is used to expel air trapped inside the water system
to make sure normal operation of the system. It is
usually installed at the highest point of the system.
5�3�2 Charging and Discharging of Refrigerant
he unit has been charged with refrigerant before delivery. Overcharging or undercharging will cause the
compressor to run improperly or be damaged. When refrigerant is required to be charged or discharged for
installation, maintenance and other reasons, please follow steps below and nominal charged volume on the
nameplate.
(1) Discharging: remove metal sheets of the outer casing, connect a hose to the charging valve and then
discharge refrigerant.

15
Test Operation & Troubleshooting & Maintenance
Charging
valve 1
Charging
valve 2
Notes
① Discharge is allowed unless the unit has been stopped. (Cut off the power and repower it 1 minutes
later)
② Protective measures should be taken during discharging to avoid frost bites.
③ When discharging is nished, if vacuuming cannot be done immediately, remove the hose to avoid air or
foreign matters entering the unit.
(2) Vacuuming: When discharging is finished, use hoses to connect the charging valve, manometer and
vacuum pump to vacuum the unit.
Pressure Meter
Vacuum pump
Connection Pipe
Note: when vacuuming is nished, pressure inside the unit should be kept lower than 80Pa for at least 30
minutes to make sure there is no leak. Either charging valve 1 or charging valve 2 can be used for vacuuming.
(3) Charging: when vacuuming is nished and it is certain that there is no leak, charging can be done.
◆Be sure to charge the specied amount of refrigerant in liquid state.
Since this refrigerant is a mixed refrigerant, adding it in gas form may cause the refrigerant composition to
change, preventing normal operation.
◆Before charging, check whether the refrigerant cylinder is equipped with a siphon tube or not.
With siphon tube No siphon tube