TICA P70131000000, Manual

Page: 113 / 174

113
②
Wrong DIP switch for master/slave unit
③
Wrong wiring for master/slave unit
④ Short communication cable
⑤ Whether using shielded twisted pair as the communication cable
Troubleshooting:
Check whether IDU and
ODU are connected to
power supply
Check whether the DIP
switch of master/slave
units is correctly set
Whether communication
cables are properly
connected
Whether communication
cables are shorted
Whether using shielded
twisted pair as the
communication cable
Replace main board
Use professionals
to provide power
Set DIP switches in accordance with circuit
diagram. Press DP04-SP03 on the main board
to check whether master/slave units are set
(master unit Ar01~32, slave units Sr01~64)
Communication cables should be wired
according to circuit diagram. Master/slave
units are connected in bus mode. Splicing is
not allowed.
Find the shorted point. Replace the communication cable for
any quality problems (AB lines are connected when power is
connected and AB lines are disconnected when power is
disconnected)
Replace communication cable to one with a diameter of
0.75-1.25 mm
2
. If maximum distance exceeds 800 m or
signal decreases significantly, note to install signal
repeaters.
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES
2.10 Compressor overload
Code displayed: ODU main board displays E002/E026 (applicable to AA/AS/AX models).
Fault detection method: Localize the fault by software or nixie tube.
Fault identification conditions: Whether momentary excess current exists
Normal protective current values:
Compressor model Current overload
parameters X(A)
E655DHD-65D2YG (KE655DHD-65D2YG) 22
E705DHD-72D2YG 23
E856DHD-80D2YG 31
Drive board P fault causes a false alarm
Power filter board damage