Daikin VRV Service Manual

Malfunction Tree Analysis (FTA) Si30-408
98 Troubleshooting
4.2 Actuation of HPS in Heating Operation
Short circuit
HPS actuation
High pressure
rises
Malfunction of
HPS
Faulty high-
pressure
control
Outside of
control
scope
Load excess
Condensation
capacity drop
Faulty control
PC board
Faulty HPS
Faulty outdoor fan
operation
Faulty control
PC board
Closed gas stop
valve
Foreign matter
clog
Faulty outdoor
electronic
expansion valve
operation
Faulty design
False
detection of
pressure
Outside of scope of
using outdoor air temp.
Fault outdoor
thermistor
Piping resistance high
Faulty model
selection
Outside of
application
scope
Operation
capacity low
Non-condensible
gas mixed
Dirty condenser
Faulty expansion
valve operation
Refrigerant over
charging
Air flow drop
Faulty high-
pressure
sensor
Warp, Collapse
Faulty control PC board
Faulty suction thermistor
Faulty
expansion
valve
Faulty
control
Fan output drop
Ventilation path
resistance high
Faulty
driving part
Faulty valve body
Faulty high-
pressure sensor
Faulty liquid
pipe thermistor
Faulty control
PC board
Faulty fan motor
Faulty control PC
board (Including
capacity setting)
Dirty filter
Obstruction

Daikin VRV Specifications

General

Brand	Daikin
Energy Efficiency	High
Control	Centralized and individual zone control
Inverter Technology	Yes
Type	Variable Refrigerant Volume (VRV)
Cooling Capacity	Varies by model
Heating Capacity	Varies by model
Refrigerant	R-32 or R-410A
Application	Commercial buildings, large residential spaces
SEER	Varies by model
HSPF	Varies by model
EER	Varies by model
COP	Varies by model
Sound Level	Varies by model
Indoor Unit Options	wall-mounted, ducted