Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

Page: 130 / 349

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[
VII
Control ]
VII Control [1] Functions and Factory Settings of the Dipswitches
1. Heat source unit
(1) Main board
[PQHY]
Switch Function
Function according to switch setting Switch setting timing
OFF ON OFF ON
SWU 1-2 Unit address setting Set to 00 or 51-100 with the dial switch Before power on
SW1 1-10
For self-diagnosis/op-
eration monitoring Refer to the LED monitor display on the
heat source unit MAIN board.
Anytime after power on
SW2
1
Centralized control
switch
Without connec-
tion to the central-
ized controller With connection to
the centralized
controller
Before power on
2
Deletion of connec-
tion information
Normal control Deletion Before power on
3
Deletion of error his-
tory SW Storage of IC/OC
error history Deletion of IC/OC
error history Anytime after power on (When
switched from OFF to ON)
4
Refrigerant amount
adjustment
Normal control
Refrigerant amount
adjustment mode
Anytime after power on (Will be dis-
abled 2 hours after compressor start
up except during initial start up mode)
5 - - - -
6 - - - -
7
Operation ON signal
output switching During Thermo-
ON During Thermo-ON
and Thermo-OFF
Anytime after power on
8
Pump interlock error
is disregarded
Ordinary control
Error is disregard-
ed.
Anytime after power on
9 - - - -
10 - - - -
SW3
1
Test run mode: en-
abled/disabled
SW3-2 disabled SW3-2 enabled Anytime after power on
2
Test run mode: ON/
OFF
Stops all ICs
Sends a test-run
signal to all IC After power on and when SW3-1 is
on.
3
CN51-3, 5 signal out-
put switching Heat source unit
error signal
Water heat ex-
changer freeze
prevention opera-
tion
-
4
Water heat exchang-
er freeze prevention
operation
Disabled Enabled
*2
Anytime after power on
5 - - - -
6 Pump down operation Normal control
Pump down opera-
tion After power on and while compressor
is stopped
7
Target condensing
temperature on the
heating mode Tcm
49°C [120°F] 53°C [127°F] Anytime after power on
8 - - - -
9 - - - -
10 - - - -