Mitsubishi Electric HP120TNU-A Service Handbook page 140

[5-2 Outdoor Unit Control ]
(2) Defrost operation
Outdoor unit Compressor frequency
Outdoor unit fan
SV1a
LEV2a, 2b
LEV2d
LEV4
LEV9
21S4a, 21S4b
SV2
BC controller LEV1
LEV3(a)
LEV4 (JA and KA types
only)
SVM1 (JA and KA types
only)
SVM1b (JA and KA types
only)
SVB
SVA
* When PWFY-AU model units are connected, SVA and SVC on the BC should be set to ON.
* On the module system, both outdoor units start in the defrost mode regardless of the operation mode before the defrost
operation.
* The compressor frequency is fixed at 60Hz for 3 minutes.
* The compressor frequency is fixed at 60Hz when the compressor bottom SH (TH15 - Te)
HWE18220_GB
Model
HP72 model
HP96, HP120 models
Stopped
ON (open)
OFF (closed), ON (open)
J type: 3000, JA type: 3000, KA type: 3000
J type: 3000, JA type: 3000,
KA type: 3000, KB type: 60 (full closed)
JA type: 3000, KA type: 3000
Ports that are connected to the indoor units in cooling Thermo-ON
Other ports: OFF
Compressor frequency
107Hz
121Hz
3000
20
0
480
OFF
ON
ON
OFF
10ºC [18ºF].
chapter 5 -
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