Mitsubishi Electric ecodan PUHZ-W50VHA2 User Manual page 41

Before Test Run: Check
After completing the installation and the wiring and piping of the local application
and outdoor units, check for refrigeration leakage, looseness in the power supply
or control wiring, wrong polarity, and disconnection of one phase in the supply.
Use a 500-volt megohmmeter to check that the resistance between the power
Warning:
Caution:
Do not carry out this test on the control wiring (low voltage circuit) terminals.
SELF-CHECK
Check code Symptom
P1 Flow water (TH1) sensor error
P2 Refrigerant liquid pipe (TH2) sensor error
P6 Freezing/Overheating protection operation
P9 Actual tank temperature (TH5) sensor error
Fb FTC2 unit control system error (memory error, etc)
EO~E5 Signal transmission failure between remote controller and FTC2
E6~EF Signal transmission failure between outdoor unit and FTC2.
- - - - No trouble generated in the past
FFFF No corresponding unit
U*, F* Outdoor unit failure, Refer to the outdoor unit wiring diagram.
1. Turn on the power
LED 1 (Power for microcomputer)
LED 2( Power for remote controller) Indicates whether power is supplied to the remote controller. This LED lights only in the
LED 3 (Communication between
FTC2 and outdoor unit)
LED 4 for maintenance
LED 5 for maintenance
2. Press [CHECK] button twice
3. Press [CHECK] button twice to finish self-check
For description of each LED(LED1~5) provided on the FTC2, refer to the following table
SW3-2 Operation
OFF Water circulation pump is OFF
ON Water circulation pump is ON.
(It is switched OFF after 60 minutes consecutive operation.)
INSTALLATION: FTC2
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates states of communication between FTC2 and outdoor unit. Make sure that this
LED is always blinking.
-
-
Table 2.8
38
A CHECK button
B IC: FTC2 unit
OC: Outdoor unit
D Check code
Table. 2.6
INITIAL FILLING-UP
When the system is installed, the whole circuit must be
filled with water. At this stage, water circulation pump
and zone valves will be operated individually.
Water circulation pump operates according to Dip SW3-
2 setting.
Fig 4.2
Table 2.7
39