Optional Connector Specifications Of Hot Water Module P.c. Board; Test Operation Of Hot Water Module Unit - Toshiba MMW-AP0481CHQ-E Service Manual

7-2. Optional connector specifications of hot water module P.C. board

Function Terminal
MCC-1643
HA
/CN61
CHK
MCC-1643
Operation
/CN71
check
Outside MCC-1628
trouble input /CN703
Function Terminal
Option output TB03

7-3. Test operation of hot water module unit

Check function for operation of hot water module (Functions at hot water module side)
This function is provided to check the operation of the hot water module singly without communication with the
remote controller or the outdoor unit. This function can be used regardless of operation or stop of the system.
However, if using this function for a long time, a trouble of the equipment may be caused. Limit using this
function within several minutes.
[How to operate]
1) Short-circuit CHK pin (CN71 on the hot water module P.C. board).
The operation mode differs according to the hot water module status in that time.
2) Restricted to the normal time, if short-circuiting DISP pin (CN72 on the hot water module P.C. board) in
addition to short-circuit of CHK pin (CN71 on the hot water module P.C. board), the minimum opening
degree (30 pls) can be set to the hot water module PMV1 (R410A side) only.
When open DISP pin, the maximum opening degree (1500 pls) can be obtained again.
[How to clear]
Open CHK pin. While the system is operating, it stops once but automatically returns to operation after
several minutes.
Hot water module PMV 1 (*)
Communication
P.C. board LED
* To exchange the hot water module PMV1 coil, set the hot water module PMV1 to Max. opening degree.
• For the detailed positions of CHK pin (CN71 on hot water module P.C. board), refer to the hot water module
P.C. board MCC-1643.
Pin No. Specifications
1 Start/stop input
2 0V (COM)
Remote controller
3
disabling input
4 In-operation output
5 DC12V (COM)
6 Alarm output
1 GND
2 Check mode input
1 COM (DC12V)
Outside trouble
2
input
3 —
4 —
5 —
Pin No. Specifications
COM DC12V
S1 Defrosting output
S2 Heater output
S3 —
Heating thermostat
S4
output
S5 Pump output
Short-circuit of CHK pin
DISP pin open
Max. opening degree (1500 pls)
All ignored
Lights
Start/stop input for HA (J01:In place/ Removed = Pulse
input (factory default) / Step input)
Enables / disables start / stop control via remote
controller
ON during operation (HA answerback signal)
ON while alarm ON
Used for hot water module operation check (prescribed
operational status output, such as R410A_PMV
(PMV1) ON, to be generated without communication
with outdoor unit or remote controller)
Generates test code L30 and automatically shuts
down air conditioner (only if condition persists for 1
minute)
ON while outdoor unit is defrosting
ON while heating thermostat ON (compressor ON)
DISP pin short circuit
Min. opening degree (30 pls)
All ignored
Lights
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Remarks
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Remarks
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