Sanyo SPW-C366VH8 User Manual

5-11
5
SPW-C486VH for single-phase and C256 / 366 / 486 / 606VH8 for 3-phase
(2-2) [Alarm “P26”]
No
Start of defect diagnosis
Is the power voltage correct?
Improve the power voltage line.
No
Repair the wiring connectors.
Check the following wiring:
Display
on PCB
HIC PCB
side
Outdoor unit
control PCB side
Display
on PCB
HIC PCB
side
Outdoor unit
control PCB side
HIC+ CN04 CN069 (wire : yellow) HIC1 CN01 CN207 (10P white)
HIC- CN05 CN070 (wire : gray) HIC2 CN02 CN206 (8P white)
No
Repair the wiring connectors.
HIC PCB side
U (CN06) pink
V (CN07) white
W (CN08) blue
No
Tighten the screws  rmly.
Abnormal temperature rise in the HIC PCB is prevented by radiating the heat,
with the heat sink being attached  rmly to the HIC PCB by screws.
The HIC PCB cannot radiate properly if the screws are loose. Consequently,
the temperature inside the HIC PCB can rise abnormally and the alarm P26 occurs.
No
Operating on high load.
Recovery methods differ in accordance with the cause.
• Recharge refrigerant
• Replace the thermistor
• Repair the pipes, etc.
1. Potential Causes
• Refrigerant overcharge
Has the refrigerant been overcharged?
* Verifying Overcharge
There is no problem if the difference between the temperature on the indoor unit "E2" and
the saturated temperature of the outdoor unit's gas pipe service valve pressure is within 2
during the heating mode. Any of the following could be the reason if the former is two or more
degrees lower than latter.
• Faulty operations of the outdoor unit electronic expansion valve.
• Pipe blockage, crushed pipes, etc.
(Assumed to be on the liquid pipes during the cooling mode and the gas pipes during the
heating mode.)
• C1 and C2 thermistor error on the outdoor unit (during the cooling mode.)
• E1 and E2 thermistor error on the indoor unit (during the heating mode.)
2.Temperature on the high-pressure side during normal operations.
Cooling: Temperature of the C2 thermistor on the outdoor unit is approximately between 45 and
55 .
Heating: Temperature of the E2 thermistor on the indoor unit is approximately between 40
and
50 .
*
There are cases in which the above temperatures will be lower depending on the operation conditions.
No (alarm P26 output)
Replace the HIC PCB.
The HIC PCB is considered faulty if the alarm P26 occurs even if the compressor is not operating
owing to the U, V and W wires being disconnected.
Replace the HIC PCB.
No (Abnormal resistance value)
Replace the HIC PCB.
• Veri cation method: Remove the HIC PCB and measure the resistance at all areas.
Refer to the page 5 - 12.
Replace the HIC PCB if the readings are below permissible values.
No (Defective insulation)
Replace the compressor.
• Potential cause: Insulation failure caused by the compressor lock.
• Veri cation Method
Remove the wires from the connectors on the top of the compressor. Measure the insulation
resistance of the U, V and W phases and con rm that they are 1M or more.
Are the wiring connector
connections OK?
Are the U/V/W
connections on the HIC
PCB and compressor
terminal OK?
Are the screws
of HIC PCB tightened
 rmly?
Is the high-pressure
for the refrigerant cycle within
the range? (High load
operating?)
Does the alarm
P26 occur when the
U / V / W wires (pink/white/blue)
are disconnected from the
HIC PCB and
operation was
started?
Are the resistance
values permissible at all areas
in HIC PCB?
Is the insulation on the
compression OK?
Replace the outdoor unit control PCB and HIC PCB.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
(No problem
on tightening)
(Not operating
on high load)
(An alarm other than the alarm P26 occur)
(No problem with
the resistance value)
Yes
(No problem with
the insulation)
Check the following:
Check to ascertain that the power voltage is within the permissible range of 198 to 264V
for indoor and outdoor units regardless of whether the compressor is operating or not.
Regarding 3-phase outdoor unit, the power voltage is 342 to 456 V.
* Pay special attention to whether the voltage drops after compressor operations while measuring.
Excessive current alarm of HIC PCB
Related parts
• HIC PCB (CR-HIC160B-E, HIC-CR364GVH8, HIC-CR604GVH8)
• Outdoor unit control PCB (CR-C486VH, CR-C256VH8, CR-C606VH8)
SM830160-03ClassicPAC-iA4.ind1111SM830160-03ClassicPAC-iA4.ind1111 2010/02/1610:30:062010/02/1610:30:06

Sanyo SPW-C366VH8 Specifications

General

Brand	Sanyo
Model	SPW-C366VH8
Category	Air Conditioner
Language	English