Mitsubishi Electric CMB-WM108V-AA Service Handbook page 120

[ VI Control ]
(3) Defrost cycle
Outdoor Unit
HBC controller
(other than 3-
way valve and
water flow rate
control valve)
HBC controller
(3-way valve
and water flow
rate control
valve)
HBC controller
(3-way valve
and water flow
rate control
valve)
*The indoor unit fan will stop during defrost.
HWE1708A
Dip switch setting
Operation mode Heating-only
Outdoor unit fre-
quency
Outdoor unit fan
SV1a
SV5b
21S4a, 21S4b
SV9
LEV1
LEV2
LEV3
SV1
21S4Ma
21S4Mb
PUMP1
PUMP2
Dip switch setting
Indoor unit mode Heating Thermo-
VB3a~p Scheduled control Scheduled control Scheduled control
Dip switch setting
Indoor unit mode Heating Thermo-
VB3a~p C800 or H800
Bypass defrost
SW3-10 ON
Heating-main
41
41
ON
ON
Scheduled control
Scheduled control
Heating Thermo-
ON OFF
SW3-10 OFF
Heating Thermo-
ON OFF
C800 or H800
- 111 -
Heat recovery defrost
SW3-10 OFF
Heating-only
103Hz
Stop
ON (open)
ON (open)
OFF
OFF (closed)
3000
3000
3000
OFF
OFF
ON
Command value 100%
Command value
100%
SW3-10 ON
Cooling Thermo-
ON
Cooling Thermo-
ON
Scheduled control
Heating-main
41
OFF
Scheduled control
Cooling Thermo-
OFF
C800 or H800
Cooling Thermo-
OFF
C800 or H800
GB