SERVICE FUNCTIONS
10
10-1. COMPULSORY DEFROSTING MODE FOR SERVICE
By short circuit of the connector JPDS and JPSG (MUCFH-A18WV) / JPG1 and R871 (MUCFH-A24WV) 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 page 27 or 28.)
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 page 27 or 28.)
E1
MUCFH-A18WV-
E1
MUCFH-A24WV-
Jumper wire
JRF
JRG
Model
Change point
Defrost interval time changes from 40 minutes to 15 minutes.
Defrost start temperature changes from -3
:
to 0
:
. (MUCFH-A18WV)
Defrost start temperature does not change.(-3.0
:
) (MUCFH-A24WV)
Defrost finish temperature changes from 3.1
:
to 10.1
:
.(MUCFH-A18WV)
Defrost finish temperature changes from 3.1
:
to 15
:
.(MUCFH-A24WV)
MUCFH-A18WV -
MUCFH-A24WV -
E1
E1
18
ACTUATOR CONTROL
9
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.
ON
OFF
ON
OFF
ON
OFF
Compressor
R.V. coil
Outdoor fan
(COOL / DRY)
(HEAT)
5 sec.
5 sec.
ON
OFF
ON
OFF
ON
OFF
Example. In case of power ON
with remote controller
MUCFH-A18WV -
MUCFH-A24WV -
E1
E1
OB337B--1.qxp 05.7.6 11:00 AM Page 18
