Panasonic 2WAY Multi Technical & Service Manual page 146

12) Forced defrosting operation setting (Level 2)... Used when frost builds up on the outdoor unit's heat
exchanger when in the heating mode.
* Cannot be set with W-Multi and 3WAY.
* This setting applies a load to the equipment, and it must not be set if no frost has built up on the outdoor
unit's heat exchanger.
* Defrosting operations perform the enforced cooling cycle (even when the indoor unit is in the heating
mode.) It is therefore necessary to be the permission of the customer before making this setting.
Display
Rejection conditions : Operations are paused when defrosting operations are in progress (with the
Operating method
Operation details
Release method
13) Pressure sensor ignored (Level 2)
Display
Rejection conditions : None
Operating method
Operation details
Release method
14) Forced fuel gas solenoid valve closing (Level 2)
Display
Rejection conditions : None
Operating method
Operation details
Releasing method
: 
exception of the forced defrosting operations.)
: Press the SET key for one second without forced defrosting operations being set.
(The TEST/WARNING LED will be illuminated.)
If the operation signals are not issued by the indoor unit, perform operations with
the test run setting or the remote controller, etc. (This is possible in both the cooling
and heating modes.)
: If the engine is operating when the enforced setting is made, operations will be
temporarily paused.
The cooling cycle defrosting operations will be performed for ten minutes.
However, if operation signals are not issued by the indoor unit, the equipment will
go into standby mode without operating.
The forced setting in progress message will be displayed during this (the TEST/
WARNING LED will be illuminated.)
: Press the SET key for one second while the forced defrosting operations are set.
The forced setting in progress message will be cleared (the TEST/WARNING LED
will be extinguished) and the display will return to the forced setting selection
operation.
The setting will be cleared automatically once the defrosting operations have been
performed for 10 minutes and when 20 minutes has elapsed since the defrosting
settings was made (including the standby time.)
: 
: Press the SET key for one second. (The TEST/WARNING LED will be
illuminated.)
: Fix the value of the pressure sensor.
The forced setting in progress message will be displayed during this (the TEST/
WARNING LED will be illuminated.)
: Press the SET key for one second with the pressure sensor being ignored.
The forced setting in progress message will be cleared (the TEST/WARNING LED
will be extinguished) and the display will return to the forced setting selection
operation.
: 
: Press the SET (S007) key for one second when forced fuel gas electric valve closing
is not being set. (TEST/WARNING LED light)
: Fuel gas electric valve1 is blocked.
Forced setting in progress display (TEST/WARNING LED light) is shown during
this time.
: Press the SET (S007) key for one second or more when forced fuel gas electric
valve closing is being set.
The forced setting in progress display will be canceled at this time, returning to
forced setting select operation. (TEST/WARNING LED off)
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