Gree GRS-S16/Na-M, Service Manual

Page: 23 / 41

HEAT PUMP WATER HEATER (NORTHERN EUROPE) MAINTENANCE
21
2 ELECTRIC WIRING WORK
2.1 Wiring Principle
The power cord should firstly connect with dynamic power terminal in electric box and then
connect with relevant power terminals of outdoor unit and electric heater. Never mistake the
connection to avoid damage to electric elements. If the units is under protection condition. Check out
leakage causes to clear the fault and then open the electric box without power supply to reset leakage
protector. If leakage protector trips off again, stop the unit and ask professionals for help. Never check
or repair it by yourself to avoid safety accident. With green mark is normal , while with red mark
means conglutination between contacts
，
in which case, it should be replaced after cutting off its power
supply.
General principle
s:
Wires, equipment and connectors supplied for use on the site must be in
compliance with provisions of regulations and engineering requirements.
Only electricians holding qualification are allowed to perform wire connection
on the site.
Before connection work is started, the power supply must be shut off.
Installer shall be responsible for any damage due to incorrect connection of the
external circuit of the unit.
Caution --- MUST use copper wires.
2.2 Electric Wiring Design
Outdoor Unit Electric Box
L1 L2 L3 N
X17
XT1
L1 L2 L3 N PE
PE
Intdoor Unit Electric Box
CN2
XT3
CN1
AP
CN5
4
-c
o
re
t
w
s
it
e
d
p
a
ir
w
ir
e
AP2
4
-c
o
re
t
w
s
it
e
d
p
a
ir
w
ir
e
Display
Board
L1 L2 L3 N L1 L2 L3
PE
POWER 380-400V
3N
Hz
PE
Electric heater
XT1
XT2
Water Tank
Water-outlet
Temp.Sensor