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Toshiba
[P20]
<Indication 1> <Indication 2>
[Hi pressure protection operation]
Check code
Outdoor LED
indication
Check and Action procedure
(No specific description indicates outdoor unit parts.)
No
Yes
Service valve is fully opened.
No
Open fully service valve
Yes
Outdoor TL sensor is normal.
(Measure resistance)
Cooling season
Cooling operation
Heating season
Heating operation
No
Replace sensor
Yes
Remove the disturbing
element
Yes
Outdoor fan is free from crack
or looseness.
No
Check outdoor fan
If defective, replace or tighten it
Yes
Outdoor fan operates normally.
No
Check the same item as
those for [P22] abnormality
Reset the power source and perform
a trail operation according to the season.
Something prevents outdoor unit
heat exchange
- Clogged heat exchanger
- short circuit
No
Yes
Check for refrigerant overcharged, clogged
cycle, pipe break, abnormal overload, etc.
If defective, repair defective portion
Check for refrigerant overcharged, clogged
cycle, pipe break, abnormal overload, etc.
If defective, repair defective portion
Remove the
disturbing element
Something prevents heat
exchange of hydro unit.
- Clogged filter
- Clogged heat exchanger
- Short circuit
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 97 Monday, October 5, 2009 2:09 PM