Field Work Instruction; Overheating In Case Of Using Pc-5H - Hitachi Utopia RPI-2.5HRG Service Manual

4.

FIELD WORK INSTRUCTION

4.1

Overheating in Case of Using PC-5H

Question and Answer for Field Work
Example 1: Overheating in Case of Using PC-5H
[Phenomenon]
After test run, indoor temperature increases more than 30
[Cause]
Test running is performed from the outdoor unit, the operation mode at the test running is
memorized.
[Countermeasure]
In such case, perform the self checking and initialize the memory by following procedure.
1. Depress "Λ", "V", "High" and "Medium" simultaneously.
2. 7-segment and LED will be lit.
3. Depress all the touch type switches one by one.
4. 7-segment indicates "Ou".
5. Transmission check will be performed.
6. After 3 seconds, 7-segment indicates "77" (for Main Unit) or "88" (for Sub Unit) or "EE" (Abnormal).
7. After 3 seconds, voltage check will be performed.
8. After 3 seconds, 7-segment indicates "AA" (Normal) or "EE" (Abnormal).
9. After 3 seconds, automatically indicates "5", "4", "3", ..... (Count Down).
10. Depress "Λ" before "0" is appeared.
11. If the temperature setting become 25 deg. and all the LEDs are turned OFF, initial condition is set.
o
C even if the setting temperature is 20
UN/STOP
HIGH MEDIUM LOW
FIELD WORK INSTRUCTION
o
C.
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