Daikin BRC7E61W Service Manual Page 187

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Troubleshooting by Remote Controller Display / LED Display SiE25-110
178 Troubleshooting
6.35 Gas Shortage (Malfunction)
Remote
Controller
Display
U0
LED Display A — 1 — 2 — 3 — 4 —
Applicable
Models
RZP71~140D
Method of
Malfunction
Detection
(In test operation)
Detection by closed stop valve.
(In normal operation)
Gas shortage is detected according to the discharge pipe temperature.
Malfunction
Decision
Conditions
(In test operation)
Variations of the indoor unit heat exchange temperature judge whether stop valve is open or
closed.
(In normal operation)
When microcomputer judges and detects gas shortage.
* Gas shortage is not decided repeating retry. When INSPECTION button on the remote
controller is pushed, “U0” is displayed.
Supposed
Causes
The stop valve is left in closed.
Insufficient refrigerant amount
Clogged refrigerant piping system
Troubleshooting
Collect refrigerant. After vacuum
drying is complete, charge
a appropriate amount of refrigerant.
Is the refrigerant
amount appropriate?
NO
YES
Open the stop valve.
Is the stop valve open?
NO
YES
Check NO. 7
Check the refrigerant piping system
for clogging.
(S2602)
For RZP71~100D models, gas shortage alarm is indicated but operation continues. On
other models than aforementioned, operation halts due to malfunction.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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