TECHNICAL MANUAL
Chapter 10 - Length shut-downs
NGSi 05÷15
39
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
CHAPTER 10
LENGTH SHUT-DOWNS
• Turn off the units by turning the switch of each device to “OFF”.
• Turn off the water taps.
• Turn the master switch to “OFF”.
CHAPTER 11
ROUTINE CHECKS AND MAINTENANCE
Regular inspections should be performed to ensure that the unit is operating correctly:
Compressor not connected to power supply E79
OFF OFF
Inverter timeout E80
OFF OFF
Intake water probe E61
OFFOFFOFFOFF
Output water probe E62
OFFOFFOFFOFF
Compressor intake probe E63
OFFOFFOFFOFF
Compressor output probe + high pressure switch E64
OFFOFFOFFOFF
High pressure transducer E65
OFFOFFOFFOFF
Low pressure transducer E66
OFFOFFOFFOFF
External air probe for weather control E67
OFFOFFOFFOFF
Domestic hot water tank probe (optional) E69
OFFOFFOFFOFF
Flow switch E06
OFFOFFOFFOFF
High temperature E18
OFF OFF
High pressure E01
OFF OFF
Low pressure E02
OFF OFF
Anti-freeze alarm E05
OFF ON OFF OFF
If the temperature drops below zero there is a serious risk of freezing: fill the system with a mixture of water and glycol, or
drain the water system and heat pump water circuits.
WARNING:
All the operations described in this section MUST ALWAYS BE PERFORMED BY QUALIFIED STAFF. Before doing any
work on the unit or accessing internal parts, make sure that the electricity supply has been disconnected. The compressor
heads and delivery pipeline are often at quite high temperatures. Take special care when working in the vicinity of the heat
exchanger coils. The aluminium fans are particularly sharp and may cause serious injuries. After maintenance procedures,
put the panels back in place, securing them with the fixing screws.
The cooling circuits must not be charged with a refrigerant different from the one specified on the nameplate. Use of a
different refrigerant may seriously damage the compressor.
The use of oils other than those specified in this manual is forbidden. Use of a different oil may seriously damage the
compressor.
OPERATION 1 month 4 months 6 months
Filling of water circuit. x
Presence of bubbles in water circuit. x
Check that monitoring and safety devices are operating correctly. x
Check that there are no oil leaks from the compressor. x
Check that there are no water leaks in the water circuit. x
Check that the flow switch is operating correctly. x
Check that the crankcase heaters are powered up and operational. x
Clean the metal filters in the water circuit. x
Type of failure Code Compressor Pump Heaters Fan
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