[Ae] Low Hz Time Discharge Temp. (Td1) Alarm; [Af] Outdoor Unit Power Source Phase Order Miswiring - Toshiba HFCR407C Service Manual

Check code
[AE]
Low Hz time discharge temp. (TD1) alarm
Are the gas pipe and liquid pipe
service valves of the outdoor unit
fully open ?
Yes
Is there a blockage in the PMV
assembly on the liquid line ?
No
Is the cooling bypass
PMV B normal ?
Yes
Are the resistance characteristics
of TD1 sensor normal ?
Yes
Is the wiring correct ?
Yes
Insufficient refrigerant, blockage,
pipe breakage.
Check code
[AF]
Outdoor unit power source phase
order miswiring
There is an abnormal power phase order or missing phase of power supply to the outdoor unit. Check power
supply wiring.
Troubleshooting
Diagnostic procedure for check code
No
Yes
No
No
No
(Check miswiring of the outdoor unit according to miswiring check function.)
101
Operation cause
1. Outdoor unit service valve closed
2. Cooling bypass PMV error
3. TD1 sensor error
4. Insufficient refrigerant, blockage in pipe
5. Blockage of indoor filter
6. Blockage of PMV assembly on the liquid line
Cooling bypass PMV B error
Operation cause
Abnormal power phase order or missing phase of
power supply to the outdoor unit
Open valves fully.
Replace both the PMVs.
Replace TD1 sensor.
Set normal wiring.
14