Mitsubishi Electric ecodan ECOSLIM150L-PP-MEUK Installation Manual page 69

Troubleshooting
28
XXXXXXXX
No. Fault Symptom
4
LED2 on FTC4 (Master)
is off.
5 LED2 on FTC4
(Master) is blinking.
6 LED4 on FTC4
(Master) is off.
LED4 on FTC4
(Master) is blinking.
7 No water at hot tap.
(continued)
Possible Cause
<FTC4 (Master) powered on
independent source>
1. FTC4 (Master) is not supplied with
220 to 240V AC.
2. There are problems in the method
of connecting the connectors.
3. FTC4 (Master) failure.
When LED1 on FTC4 (Master) is lit.
Incorrect setting of refrigerant address for
outdoor unit.
(None of the refrigerant address is set to"0".)
When LED1 is also blinking on FTC4
(Master).
Faulty wiring between FTC4 (Master)
and outdoor unit
When LED1 on FTC4 (Master) is lit.
1. Faulty wiring in main controller
Multiple indoor units have been
wired to a single outdoor unit.
2. Short-circuited wiring in main
controller
3. Main controller failure
1. SD memory card is NOT inserted
into the memory card slot with
correct orientation.
2. Not an SD standards compliant
memory card.
1. Full of data.
2. Write-protected.
3. NOT formatted.
4. Formatted in NTFS file system.
1. Cold main off
2. Strainer (field supply) blocked.
Pre-Plumbed Slimline Cylinder Installation Manual
Explanation - Solution
1. Check the voltage across the L and N terminals on the indoor power
supply terminal block. (See section 4.1.)
• When the voltage is not 220 to 240V AC, check for faulty wiring to
power supply.
• When the voltage is 220 to 240V AC, go to 2. below.
2. Check for faulty wiring between the connectors.
• When the connectors are wired incorrectly re-wire them correctly
referring to below. (See section 4.1 and a wiring diagram on the
control and electrical box cover.)
• If no problem found with the wiring, go to 3. below.
3. Check the FTC4 (Master) control board.
• Check the fuse on FTC4 (Master) control board.
• Check for faulty wiring.
• If no problem found with the wiring, the FTC4 (Master) control
board is faulty.
Recheck the refrigerant address setting on the outdoor unit.
Set the refrigerant address to "0".
(Set refrigerant address using SW1(3 - 6) on outdoor controller circuit board.)
Check for faulty wiring between FTC4 (Master) and outdoor unit.
1. Check for faulty wiring in main controller.
The number of indoor units that can be wired to a single outdoor unit
is one. Additional indoor units must be wired individually to a single
outdoor unit.
2.,3. Remove main controller wires and check LED2 on FTC4 (Master).
• If LED2 is blinking check for short circuits in the main controller wiring
• If LED2 is lit, wire the main controller again and:
- if LED2 is blinking, the main controller is faulty;
- if LED2 is lit, faulty wiring of the main controller has been corrected.
1. Correctly insert SD memory card in place until a click is heard.
2. Use an SD standards compliant memory card. (Refer to P.67)
1. Move or delete data, or replace SD memory card with a new one.
2. Release the write-protect switch.
3. Refer to P.67
4. FTC4 is Not compatible with NTFS file system. Use an SD memory
card formatted in FAT file system.
1. Check and open stop cock.
2. solate water supply and clean strainer.
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