Symptom-Based Troubleshooting - Daikin VRVII Manual

1. Symptom-based
Troubleshooting
Symptom
1 The system does not start
operation at all.
2 The system starts operation but
makes an immediate stop.
3 The system does not cool or
heat air well.
12

Symptom-based Troubleshooting

Supposed Cause Countermeasure
Blowout of
fuse(s)
Cutout of
breaker(s)
Power failure
Blocked air inlet or outlet
of indoor or outdoor unit
Clogged air
filter(s)
Blocked air inlet or outlet
of indoor or outdoor unit
Clogged air filter(s) Clean the air filter(s).
Enclosed outdoor unit(s) Remove the enclosure.
Improper set
temperature
Airflow rate set to
"LOW"
Improper direction
of air diffusion
Open window(s) or door(s) Shut it tightly.
[In cooling] Direct sunlight
received
[In cooling] Too many persons
staying in a room
[In cooling] Too many heat sources
(e.g. OA equipment)
located in a room
Turn OFF the power
supply and then
replace the fuse(s).
• If the knob of any
breaker is in its
OFF position,
turn ON the
power supply.
• If the knob of any
circuit breaker is
in its tripped
position, do not
turn ON the
power supply.
ON
Knob
Tripped
OFF
Circuit breaker
After the power
failure is reset,
restart the system.
Remove
obstacle(s).
Clean the air
filter(s).
Remove
obstacle(s).
Set the temperature to
a proper degree.
Set it to a proper
airflow rate.
Set it to a proper
direction.
Hang curtains or
shades on windows.
The model must
be selected to
match the air
conditioning load.