Mitsubishi Electric City Multi PQHY-P72 Service Handbook page 132

[PQRY]
Switch Function
SWU 1-2 Unit address setting
For self-diagnosis/op-
SW1 1-10
eration monitoring
Centralized control
1
switch
Deletion of connec-
2
tion information
Deletion of error his-
3
tory SW
Refrigerant amount
4
SW2 adjustment
5 -
6 -
Operation ON signal
7
output switching
Pump interlock error
8
is disregarded
9 -
10 -
Test run mode: en-
1
abled/disabled
Test run mode: ON/
2
OFF
CN51-3, 5 signal out-
3
put switching
Water heat exchang-
4 er freeze prevention
operation
SW3
5 -
6 Pump down operation Normal control
Target condensing
7 temperature on the
heating mode Tcm
8 -
9 -
10 -
1 -
2 -
3 -
4 -
5 -
SW4
6 -
NIGHT MODE/Step
7
DEMAND mode
8 -
9 -
10 -
Function according to switch setting
OFF
Set to 00 or 51-100 with the dial switch
Refer to the LED monitor display on the
heat source unit MAIN board.
Without connection With connection to
to the centralized the centralized con-
controller troller
Normal control Deletion
Storage of IC/OC Deletion of IC/OC
error history error history
Refrigerant amount
Normal control
adjustment mode
-
-
During Thermo-ON
During Thermo-ON
and Thermo-OFF
Ordinary control Error is disregarded. Anytime after power on
-
-
SW3-2 disabled SW3-2 enabled
Sends a test-run sig-
Stops all ICs
nal to all IC
Water heat ex-
Heat source unit er-
changer freeze pre-
ror signal
vention operation
Disabled Enabled
-
Pump down opera-
tion
49°C [120°F] 53°C [127°F]
-
-
-
-
-
-
-
-
-
NIGHT MODE Step DEMAND
-
-
-
- 123 -
Switch setting timing
ON OFF
Before power on
Anytime after power on
Before power on
Before power on
Anytime after power on (When
switched from OFF to ON)
Anytime after power on (Will be dis-
abled 2 hours after compressor
start up except during initial start up
mode)
-
-
Anytime after power on
-
-
Anytime after power on
After power on and when SW3-1 is
on
*2
Anytime after power on
-
After power on and while compres-
sor is stopped
Anytime after power on
-
-
-
-
-
-
-
-
-
Before power on
-
-
-
[ VII Control ]
ON
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-