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79
TM-FLH--0515-C
Pressure
Data
Circuit
Too
low
A
li
ttl
e
low
Norma
l
A
little
hig
h
Too
high
Probable cause
High side
Low side
●
●
1. Overcharged with refrigerant.
2. Non-condensable gases in refrigerant circuit (e.g. air)
3. Obstructed air-intake / discharge.
4. Hot air short circuiting in outdoor unit.
High side
Low side
●
●
1. Poor compression / no compression (compressor
defective)
2. Reversing valve leaking.
High side
Low side
●
●
1. Undercharged with refrigerant.
2. Refrigerant leakage.
3. Air filter clogged / dirty (indoor unit).
4. Indoor fan locked / seized.
High side
Low side
●
●
1. Outdoor fan blocked (cooling).
2. Outdoor coil dirty (cooling).
3. Non-condensable gases in refrigerant circuit (e.g. air)
High side
Low side
●
●
1. Air intake temperature of indoor unit too high.
Diagnostic Guidelines
By means of pressure reading :
Summary of Contents for FH15CBV1L
Page 1: ...Ceiling Exposed TM FLH 0515 C TECHNICAL MANUAL...
Page 54: ...52 TM FLH 0515 C Figure 2 Figure 3...
Page 55: ...53 TM FLH 0515 C Figure 4 Figure 5...
Page 69: ...67 TM FLH 0515 C Outdoor Unit Model R18 20CV1 Indoor Unit Model FH20CBV1L FH20CBV1M...
Page 72: ...70 TM FLH 0515 C Indoor Unit Model FLN30EV1L FLN30EV1M Outdoor Unit Model RN28CV1...
Page 73: ...71 TM FLH 0515 C Outdoor Unit Model R35DV1 Indoor Unit Model FH40CBV1L FH40CBV1M...
Page 74: ...72 TM FLH 0515 C Indoor Unit Model FLN40DV1L FLN40DV1M Outdoor Unit Model RN35DV1...
Page 75: ...73 TM FLH 0515 C Model R40 50DY1 Model FH40 50CBV1L FH40 50CBV1M...
Page 76: ...74 TM FLH 0515 C Model RN40 50DY1 Model FLN40 50DV1L FLN40 50DV1M...
Page 77: ...75 TM FLH 0515 C Model R61DY1 Model FH61CBV1L FH61CBV1M...
Page 78: ...76 TM FLH 0515 C Model RN61DY1 Model FHN62CV1L FHN62CV1M...
Page 86: ...84 TM FLH 0515 C FL15 20 25EV1L FLN15 20 25 30EV1L Note Dimension in mm...