Mitsubishi Electric PURY-P200 Service Handbook page 143

Checking
code
6607 No ACK abnormality
(continued)
System Generating
Display of
com- unit
trouble
position
address
1. Outdoor Remote
unit(OC) controller
(RC)
2. BC M-NET
controller remote
(BC) controller
(RC)
MA remote
controller
(MA)
3. Indoor Remote
unit (IC) controller
(RC)
4. Remote Remote
controller controller
(RC) (RC)
Meaning, detecting method
When no ACK signal is detected in 6 continuous times with 30 seconds
interval by transmission side controller, the transmission side detects
error.
Note : The address/attribute shown on remote controller indicates the
controller not providing the answer (ACK).
Detecting
Cause
method
No reply As same that for single
(ACK) at BC
refrigerant system.
transmission
to OC
No reply As same that for single
(ACK) at IC refrigerant system.
transmission
to BC
No reply (1) Cause of (1) ~ (5) of "Cause
(ACK) at RC for single refrigerant system".
transmission (2) Disconnection or short circuit
to IC of transmission line of OC
terminal block for centralized
control (TB7).
(3) Shut down of OC unit power
source of one refrigerant
system.
(4) Neglecting insertion of OC
unit power supply connector
(CN40).
(5) Inserting more than 2 sets of
power supply connector
(CN40) for centralized
control use.
For generation after normal
operation conducted once, the
following causes can be
considered.
• Total capacity error (7100)
• Capacity code setting error
(7101)
• Connecting set number error
(7102)
• Address setting error (7105)
No reply (1) Cause of (1) ~ (3) of "Cause
(ACK) at IC for single refrigerant system".
transmission (2) Disconnection or short circuit
to RC
of transmission line of OC
terminal block for centralized
control (TB7).
(3) Shut down of OC unit power
source of one refrigerant
system.
(4) Neglecting insertion of OC
unit power supply connector
(CN40).
(5) Inserting more than 2 sets of
power supply connector
(CN40) for centralized
control use.
At generation after normal
operation conducted once, the
following causes can be
considered.
• Total capacity error (7100)
• Capacity code setting error
(7101)
• Connecting set number error
(7102)
• Address setting error (7105)
- 140 -
Cause checking method &
Countermeasure
Same as measure for single refrigerant
system.
Same as measure for single refrigerant
system.
(a) Shut down the power source of
both IC and OC for over 5 minutes
simultaneously, and make them
again.
Normal state will be returned in
case of accidental trouble.
(b) Check for (1) ~ (5) of causes. If
cause is found, remedy it.
(c) Check other remote controller or
OC unit LED for troubleshooting for
trouble.
→ Modify the trouble
Trouble
according to the content
of check code.
No trouble → Faulty indoor controller
(a) Shut down the power source of OC
for over 5 minute, and make it
again.
Normal state will be returned in
case of accidental trouble.
(b) Check for (1) ~ (5) of causes. If
cause is found, remedy it.
When normal state can not be
obtained, check (1) ~ (5) of causes.