Toshiba HWT-601XWHM3W-ETR Service Manual page 134

Outdoor LED
Check code
indication
[P20]
(No specific description indicates outdoor unit parts.)
[High pressure protection operation]
Service valve is fully opened
Reset the power source and perform
test run matching to the season
Cooling season
Cooling operation
Outdoor PD sensor is normal
(confirmation by remote controller)
Outdoor fan is free from crack
or looseness.
Outdoor fan operates normally
Something prevents outdoor unit
heat exchange
- Clogged heat exchanger
- Short circuit
Check for refrigerant overcharged, clogged
cycle, pipe break, abnormal overload, etc.
If defective, repair defective portion
Something prevents heat
exchange of hydro unit
- Clogged filter
- Clogged heat exchanger
- Short circuit
Check for refrigerant overcharged, clogged
cycle, pipe break, abnormal overload, etc.
If defective, repair defective portion
133
Check and Action procedure
Heating season
Heating operation
Replace sensor
Check outdoor fan
If defective, replace or tighten it
Check the same item as
those for [P22] abnormality
Remove the disturbing
element
Open fully service valve
Remove the
disturbing element