Delta PG-35 User Manual download pdf (Page 45)

12-2

TROUBLESHOOTING

SM DELTAZ 1-E.0 GB

No SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION

Compressor is over heated

and unit does not generate

capacity

EEV problem Check EEV

Units goes into protections

and compressor is stopped

with no clear reason

Control problem or

refrigeration system

problem

Perform diagnostics (See 13.1.3 below), and

follow the actions described.

Compressor motor is

generating noise and no

suction occurs

Phase order to

compressor is wrong

Check compressor phase order.

Water leakage from indoor

unit

Indoor unit drainage

tube is blocked

Check and open drainage tube.

Freezing of outdoor unit in

heat mode and outdoor unit

base is blocked with ice

Connect base heater.

Unit operates with wrong fan

speeds or wrong frequency

Wrong jumper settings

Perform diagnostics (See 12.1.3 below),

and check if units is operating by EEPROM

parameters.

12.1.2 Checking the refrigeration system

Checking system pressures and other thermodynamic measures should be done when system

is in Test Mode (in Test mode, system operates in fixed settings). The performance curves

given in this manual are given for unit performance in test mode when high indoor fan speed is

selected.

Entering test mode:

Set unit to Cool/16 degrees/High indoor fan speed, or Heat/30 degrees/High indoor fan speed,

and enter diagnostics.

12.1.3 Judgment by Indoor/Outdoor Unit Diagnostics

Enter diagnostics mode - press for five seconds Mode/Reset button in any operation mode.

Acknowledgment is by 3 short beeps and lights of all Display LED’s. Then, The units will enter

into Indoor and Outdoor unit diagnostic modes.

During the Outdoor unit diagnostics all three Indoor LED’s (STBY/Operate, Filter and Timer)

are blinking. When Indoor diagnostics is displayed, all three LED’s (STBY/Operate, Filter and

Timer) are ON.

When system enters diagnostics mode, only one fault code is shown. Order of priority is from

the lower to the higher number. Diagnostics is continuously ON as long as power is ON. The

current system operation mode will not be changed.

If no fault occurred in the system, no fault code will be displayed during normal operation MOde.

The last fault code will be displayed even if the system has recovered from that fault. The last

fault will be deleted from the EEPROM after the system has exit diagnostics mode.

In diagnostics mode, system fault / status will be indicated by blinking of Filter & Timer LEDs.

The coding method will be as follows:

Filter LED will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds.

Timer LED will blink during the same 5 seconds according to the following Indoor / Outdoor

unit tables:

Note: 0 – OFF, 1-ON

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Delta PG-35 User Manual Page 45

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