Actuator Control; Service Functions - Mitsubishi Electric MUCFH-GA35VB Service Manual

9

ACTUATOR CONTROL

MUCFH-GA35VB
R.V. coil control
Heating · · · · · ON
Cooling · · · · · OFF
Dry · · · · · · · · OFF
NOTE. : The 4-way valve reverses for 5 seconds right before start-up of the compressor.
Example. In case of power ON
with remote controller
Compressor
R.V. coil
Outdoor fan
10

SERVICE FUNCTIONS

MUCFH-GA35VB
10-1. COMPULSORY DEFROSTING MODE FOR SERVICE
By short circuit of the connector JPDS and JPSG (MUCFH-GA35VB/GA50VB) / JPG1 and R871 (MUCFH-GA60VB) on
the outdoor deicer P.C. board, defrosting mode can be accomplished regardless of the defrost interval restriction.
Defrost thermistor RT61 must read below -3:. (Refer to 11-5.)
10-2. CHANGE IN DEFROST SETTING
<JRF> When the JRF wire of the deicer P.C. board is cut, the defrost interval time will be changed.
<JRG> When the JRG wire of the deicer P.C. board is cut, the defrost temperature will be changed.
(Refer to 11-5.)
Model
MUCFH-GA35VB
MUCFH-GA50VB
MUCFH-GA60VB
MUCFH-GA50VB
(COOL / DRY)
5 sec.
ON
OFF
ON
OFF
ON
OFF
MUCFH-GA50VB
Jumper wire
Defrost interval time changes from 40 minutes to 15 minutes.
JRF
Defrost start temperature changes from -3: to 0:. (MUCFH-GA35VB/GA50VB)
Defrost start temperature does not change.(-3.0:) (MUCFH-GA60VB)
JRG Defrost finish temperature changes 10.1:.(MUCFH-GA35VB)
Defrost finish temperature changes from 3.1: to 10.1:.(MUCFH-GA50VB)
Defrost finish temperature changes from 3.1: to 15:.(MUCFH-GA60VB)
MUCFH-GA60VB
(HEAT)
5 sec.
MUCFH-GA60VB
Change point
24
ON
OFF
ON
OFF
ON
OFF